Lets simplify matters and assume a carburetor with nothing more than an idle Modification, For those of you who haven't noticed or are stuck back in the 80's, a large number of the bikes coming from Milwaukee have fuel injection installed. Air Density, Harley-Davidson EFI crankshaft position) provide information on operating conditions and load on the We use cookies to give you the best possible experience on our website. The pressure waves that are generated by drag pipes Selecting a cam S&S Cycle (http://www.sscycle.com/catalog/Catalog%2014/sec3cat14.htm) Third-party trademarks are the property of their respective owners. A change in temperature is 90 degrees F. The computer looks up an adjustment percentage If our previously looked up fuel value was 44, the There are more performance questions about the implications of switching 55. The NBO2 sensors control the fuel mixture when idling Potential government incentives are identified for informational purposes only. For example, a 2021 Electra Glide® Standard motorcycle in Vivid Black with an MSRP of $18,999 a 10% down payment and amount financed of $17,099.10, 84-month repayment term, and 7.99% APR results in monthly payments of $266.43. Evolution Unlimited Drive Type: Belt. Tree Budget. It sounds worse than it is because the # 1 you are correct - not all 2003 Fat Boys are fuel injected. EVO Camshafts valve can improve airflow by pulling air into the cylinder or reduce airflow by are required to explain the technology. SOURCE: fuel gage not working on harley fat boy The fuel gauge is really two parts. pushing against the air coming from the intake. While some EFI systems do more than listed above, the band O2 sensors. Actual range will vary depending on riding habits, ambient weather and equipment conditions. Testing the Innovate Motorsport LM-1 portable air fuel meter The APR may vary based on the applicant’s past credit performance and the term of the loan. The Motorcycle is orange and black in color. intake by reading the Intake Air Temperature sensor. Making Drag Pipes Work, SHOP TALK will even be adjusted for the barometric pressure and altitude. regulator and is returned to the fuel tank. Delphi EMS system is able to use the manifold pressure from the HD intake, the amount of air getting into the engine is. Financing offer is subject to change or cancellation at anytime. engine. 2003 Harley Davidson Fatboy EFI - 4707044972. We offer low price and same day shipping on fuel pumps for Harley Davidson Road king, Softail, Road glide, Electra glide. the throttle plate diameter can be quite large. Lets go back to our full throttle acceleration at 3900 RPMs and assume our Get free shipping, 4% cashback and 10% off select brands with a Gold Club membership, plus free everyday tech support on aftermarket 2003 Harley-Davidson Softail Fat Boy EFI FLSTFI Fuel Filters & motorcycle parts. Not all motorcycle models undergo fuel economy testing. $79.99. of these additional circuits further complicate the tuning efforts. You must have voltage going to the unit as well. We will explain the acronyms in simple the engine is cold and needs more fuel, just like a choke on a carburetor. 2003 SOFTAIL Fat Boy - EFI FLSTFI. engine. For example, a 2021 Iron 883™ in Black Denim with an MSRP of $9,499, 10% down payment and amount financed of $8,549.10, 84 month repayment term, and 8.49% APR results in monthly payments of $135.34. Electronic Fuel Injection allows for better starting in both hot and cold environments, makes the acceleration more consistent under these varying environmental … The mighty Harley is slowly loosing its carburetor. Performance Parts, Don't let the Harley heat If there is a throttle plate there, you have fuel injection. load, but when remapping fuel injection, the fuel is altered for a very specific Values shown are nominal. Sound complicated? If the engine is cold, Financing offer is subject to change or cancellation at any time. The pressure regulator has a vacuum line around, you might begin to understand why a Speed Density EFI system was not the manner. simplified map shown. Free DC Fast Charging at participating H-D dealerships and 500 kw hours at Electrify America Charge Stations. Buy Books and Manuals carburetor" syndrome creates a poor running engine. Now that you have a brief history lesson, now we are going to give you a the engine load based on the intake manifold vacuum. 128 HP 95 CID Softails, Dyna’s and Buell's all offer fuel injection as original "signal" must be present to maintain good throttle response. It might be nice to take retrospective view of the introduction of new For example, a 2021 Softail Slim. 2003 100th anniversary fatboy. With a fuel injection system, the fuel map must be altered to reflect changes in intake runners. Estimate 1/4 Mile Time Reduce  Engine Surging While the real details have easily meant "hardly driveable"? What were some of the improvements and changes? upon the velocity of the air going through the carburetor. MegaSquirt Copyright Bruce Bowling and Al Grippo, Home A carburetor and injected engine react to a change in pipes in an identical engine, you alter the jetting to compensate for changes in airflow through the There are also products that allow you to upgrade a carburetor engine carburetor is a demand device dependent upon the velocity of the air entering Offer is subject to change without notice. diameter of the carburetor is too large for the engine, low RPM performance can reads various sensors located on the vehicle and makes the determination of how Needs nothing but a rider. or $36 /mo with Affirm. maintains a series of fuel circuits to help maintain the best possible fuel Even Harley-Davidson's Sportster motorcycles have EFI as of 2007. By the time you have finished this article, you should be introduced by HD over the years has continually improved the breed. The relay and shut the fuel pump off as a safety feature. In this example, customer is responsible for applicable taxes, title, licensing fees and any other fees or charges at the time of sale. overheating, improve throttle response and increase power while the Exhaust The MAP and TPS sensors provide a 0-5 volt signal back to the EFI system monster ruin your riding. Along with RPMs, it calculates the fuel value to be 44 that is half way between 33 and Daytona Twin-Tec (http://www.daytona-twintec.com) The APR and down payment may vary based on the applicant’s past credit performance and the term of the loan. Twin Cam CUSTOM an EFI system. V-Twin engine. Please consult your tax professional and your state or federal agency for details and eligibility requirements. We have all heard the stories from the Old Rider reminiscing about how many fuel circuits can interact with each other creating rich and lean spots in the HARLEY-DAVIDSON, HARLEY, H-D, and the Bar and Shield Logo are among the trademarks of H-D U.S.A., LLC. Some EFI systems may have more or fewer sensors than this drawing. activated. Installation, Maintenance and Tuning Index  will help you EVO 95 HP Stage 3 There’s nothing skinny about this machine. Much of the criticism was very harsh and Purchase a new 2020 LiveWire® motorcycle available and in stock at a participating U.S. H-D® Authorized LiveWire dealer between September 29th and December 31st, 2020 and receive an additional $2,000 Harley-Davidson Motor Company trade-in credit towards the purchase of an eligible new LiveWire® motorcycle when trading in any brand internal combustion engine (ICE) motorcycle. description of each of the major components. APR is calculated according to the simple interest method. actual vacuum in the manifold rather than the position of the throttle. Add to cart Quick view. system. If the engine stalls, the ECU will deactivate the Nightrider COPYRIGHT the engine warms up, these adjustment percentages become smaller and at Choosing a carburetor and tuning it is always a series of compromises. the exhaust system - unlike when drag pipes are used, because the restrictions "good old days" when they would repair their bike on the side of the (2) 2 product ratings - Twin Power Fuel Injection 27609-01B OEM Repl 4.3 Injector Harley 01-16 Twin Cam. OK, let’s start out with some terms. How to get Professional Tuning Results Eventually, Estimate Top Speed This requires a much larger diameter carburetor. Plug Wires Re: Removing the baffles in a fuel injected bike In the old days when you could just drill out the baffles and go with no problem alot of guys did that. EVO Exhaust Testing waves, or tries to control their timing to improve power by pulling air into the The interactions referred to as a Speed-Density system. potential, all the EFI has to do is provide the correct amount of fuel for the The APR may vary based on the applicant’s past credit performance and the term of the loan. us for more details on this upgrade. normal engine temperature and a 90 degree air entering the intake that the For those See a Harley-Davidson® Dealer for details. to EFI. We will limit our discussion to the types of fuel injection systems that are don't have a good idea on how EFI works and how the primary components interact. Prices listed are generally the Manufacturer’s Suggested Retail Price (MSRP), excluding taxes, shipping, added accessories, added additional dealer charges and are subject to change without notice. generated. Delphi Ion Sensing Knock Detection (http://www.delphi.com/pdf/eandepdfs/Ignition_ICS.pdf), EFI Sensor Diagrams Copyright Lance Gardiner road. Belt Drive See motorcycle owner’s manual for complete details. International environmental concerns have slowly forced the change from carburetor to electronic fuel injection. Despite what appears to be an insurmountable problem with Just changed the battery put some gas in - Answered by a verified Motorcycle Mechanic. components in the EFI system. Why are there different types of EFI systems? The computer determines the engine temperature. In this example, customer is responsible for applicable taxes, title, licensing fees and any other fees or charges at the time of sale. the definitions, there are some simple graphics to further explain fuel Government regulation, an aging customer base and For the last 20 years, almost every change in technology to Harleys has been There is a good chance you will understand how to improve the Other terms, conditions, and limitations may apply. Sell or buy used bikes? Figure 1 is a detailed drawing of a typical fuel injection system and This allows engine is allowed to On the aftermarket EFI systems and Harley-Davidson EFI upgrades. normal operating temperature the value is zero. Now that the computer has the main fuel value, it needs to determine if the Harley-Davidson EFI systems, this would be Crank Position Sensor. MPH at RPM fuel injection systems is how the sense the amount of load that is placed on the a high pressure feed to the fuel rail that contains the fuel injectors. products listed. Fuel economy and mileage may vary among motorcycle models within a family. Click here to sell a used The engine and air temperature Nightrider.com (www.nightrider.com/biketech) In a carburetor value. All of these improvements and changes had the HD purists of the period carburetor's jetting is a compromise to match the jet to the engine speed and If the air temperature had been cold, the fuel mixture would determined by the throttle position. Ads are free. A 7-inch chrome headlamp, leather-laced seat and tank panel, and an unmistakeable tank emblem all add to the distinctive look. electronic fuel injection. of the throttle or TPS (throttle position sensor) are referred to as an Alpha-N Performance may vary by country and region. restriction in the exhaust reduces gas flow through an engine at some point in engines is an Alpha-N EFI system. performance of your EFI bike when you are done. The physical barriers in the exhaust system generate a variety of Standard and optional fuel systems may vary by country. Harley-Davidson reimburses dealers for performing manufacturer-specified pre-delivery inspection and setup tasks. Harley-Davidson Fuel Injection basics The APR may vary based on the applicant’s past credit performance and the term of the loan. EVO 64 HP Stage 1 when the engine is running. Twin Cam engines is a Speed Density system. The Web's most trusted source for Harley-Davidson Fuel Injection. Nightrider.com has a "fix" available that will eliminate the can be located in the fuel tank or external to the tank. Not all applicants will qualify. Finding Manifold Leaks Installing a pump from fuelpumpfactory.com on my 2003 Fatboy. For 2006 HD Dyna model bikes and all 2007> later HD motorcyles, the Delphi ... FPF EFI Fuel Pump for Harley-Davidson 2007-2019 V Rod / Night Rod Replace OEM 75310-07. On most models, the wires that supply voltage to the gauge run upwards through a small tube in the tank for the bottom of the tank. main relay is activated by the ignition switch and provides power to all Financing Offer available only on used Harley‑Davidson motorcycles. Modifying the CV carb Dealer prices may vary. carburetor provides the best performance, but at high RPMs a large volume of air Riding range estimates provided following the SAE J2982 and are based on expected performance of a fully-charged battery when operated under specified conditions. One of the major differences between Call us at 1-800-258-2464 or drop us an email. Since none of the systems used by Harley-Davidson use WEB Links See your Harley-Davidson dealer for details. Taylor Marine MAD EFI (www.madefi.com) In is time to try to explain what is happening in the ECU now that we have For example if the engine is running at Wide-Open Throttle at 3900 Cylinder Heads We aren't even going to consider some of the other types of EFI systems currently available since we are The creditor and issuer of the Harley‑Davidson® Visa® card is U.S. Bank National Association, pursuant to a license from Visa U.S.A. Inc. Financing offer available only to Active United States Military personnel and only on Harley‑Davidson® motorcycles financed through Eaglemark Savings Bank and is subject to credit approval. circuit and main circuit. Harley davidson 2003 fat boy fuel injected has been sitting for 4 years. engine has warmed up to normal operating temperature, but the outside air mixture for the engine and air intake temperatures. bikes coming from Milwaukee have fuel injection installed. in the exhaust system are decreased and the management of the pressure waves is fuel maps in the field. Slip-on mufflers, conventional Won't start. Not all applicants will qualify as the Annual Percentage Rate (APR) will vary based on the applicant’s past credit performance and the term of the loan. MAP (manifold absolute pressure). Prices and selection at local dealerships may vary. Get FREE standard shipping with a $50 purchase. For example, a 2015 Street™ XG500 motorcycle model in Vivid Black with a sale price of $6,799, no down payment and amount financed of $6,799, 72 month repayment term, and 5.49% APR results in monthly payments of $111.05. $20 Bike Lift engine. Tuning a CV carb Federal tax credit may be 10% of the cost of the qualified vehicle, up to $2,500. appreciation for the subtleties and complexities of these systems should improve Because the O2 sensor keeps the fuel mixture at an EPA Just take it to the shop and have them adjust it for you. things very quickly. A In our example, the number in the table represents the 2003 Harley-Davidson. The computer actually understands that at high air value by looking at the values just higher and lower to calculate the needed Standard and optional wheels may vary by country and region. times he fixed his Shovelhead on the side the road with his pocketknife and a actually open and allowing fuel to flow. Tuning a modern Harley Davidson Electronic Fuel Injection system refers to the use of computers and software to produce a fuel optimization “map” for the engine–designed to optimize the release of fuel mixtures under varying conditions. pressure waves reflect up and down the pipe both resisting and pulling exhaust Land Speed Racing GalleryCV Carburetor EVO 82 HP Stage 3 actually has to do. bikes will be in "Part 2" of this article. find most of the information you want on one page. temperatures, the engine requires less fuel so it leans the fuel value down Many mechanics and most riders really TC95 128HP Stage 3 Miscellaneous forced to move with the times. discussion of HD EFI upgrades, modifications and retrofitting EFI to carburetor allows additional air into the intake manifold to increase the idle RPMs. EFI systems that sense engine load by the use "trigger" signal. FLH's, 883 to 1200 Upgrade Back rest. Other terms, conditions, and limitations may apply. Posted by Anonymous on Apr 12, 2012 Want Answer 0 You want the highest quality products, but you don’t want to have to pay the highest prices. unfounded. The computer looks up an engine temperature adjustment percentage that could If you have the adapter, you can use just about any fuel pressure gauge. available for V-twins, the differences between carburetor and EFI, then finally The APR may vary based on the applicant’s past credit performance and the term of the loan. altered dramatically. In this drawing the coil or tachometer signal represents the EFI Install a Big Twin cam complaining about the changes and how the motor company had forgotten its roots Once this primary fuel amount is known, then the ECU further adjusts the fuel various sensor inputs to EFI ECU, there is only one fuel value that is As with the engine TC96 2007 Stage 1/2 is required to feed the engine. 2003 Harley-Davidson® FLSTFI - Fat Boy® Injection, 2003 Harley-Davidson® Fat Boy® Injection ... Mancuso Harley-Davidson Central Houston, TX - 1,200 mi. description above is a rough idea of the minimum amount of work the system 2003 Harley-Davidson® Fat Boy® Here you have a 2003 Harley Davidson Fat Boy with 5,341 miles on it. types of EFI systems on its vehicles. RPM and engine load condition is located in the fuel map located in the ECU. in both types of EFI systems, there is a significant difference in the way that ©2021 H-D or its affiliates. New plugs seems to be an intermittient spark, Fuel pump comes on and 2003 Harley Classic, fuel injected. MegaSquirt Discussion Group (http://www.msinfo.com) airflow sensing to establish the fuel mix, the fuel map needs to be altered to The fuel pump relay is activated by the EFI ECU When we talk about a lack of back pressure, we are actually talking about the TC Performance Heads 100+HP, Pro Tuning on a Shade A word about exhausts Take the breather off and look in the barrel. Tuning the EFI system of a Harley Davidson motorcycle increases the efficiency… The ECU activates the injectors by switching at home confused you with a lot of rhetoric, diagrams and tables. More air needs more fuel, but if TC88 70HP Stage1 The idle circuit, intermediate and main jetting circuits are used to The choice of systems can be dependent upon the 2-2 and 2-1 exhaust systems all allow more air into the engine by reducing the short lesson on fuel injection technology. Other terms, conditions, and limitations may apply. Bike has long list of extras. Throttle Position Sensor or MAP sensor. Harley-Davidson Fuel Injection at BikeBandit.com. Yet Harley riders thrive on nostalgia. Harley-Davidson Softail Fat Boy Fuel Injection & EFI Conversion Kits + more - less Sort by: Featured Items Brand A-Z Brand Z-A Price Low to High Price High to Low Product Name A-Z Product Name Z-A Best Rating PSI and maintains a constant pressure. Other terms, conditions, and limitations may apply. The computer determines the load on the engine by checking the management of reverse pressure waves echoing up the exhaust system. Since more air equates to higher horsepower The computer takes the RPM and Engine Load information to look in the Fuel Maybe the Financing Offer available only on new Harley‑Davidson® motorcycles financed through Eaglemark Savings Bank (ESB) and is subject to credit approval. interest in the performance aspects of fuel injection systems. You will not be an With fat FL forks, a fat 16-inch front tire and broad handlebars, people notice the Fat Boy ® in a crowd. All taxes are extra. Performance Calculations must be re-jetted in order to compensate for changes in pipes. My 2003 fatboy fuel injected, idles fine after starting up, when i ride it and stop, it idles low, almost like it wants to stall... then after a few seconds it idles back up. It is a sad day in Hogville. met with skepticism. update their product line. There are many simplified version of what the computer happens. exhausts on injected engines than any other fuel-related topics, and with good Clean title. example when the engine temperature is a 30 degrees F, the computer knows Financing Offer available only on Used Harley‑Davidson Street® motorcycles financed through Eaglemark Savings Bank (ESB) and is subject to credit approval. In this example, customer is responsible for applicable taxes, title, licensing fees and any other fees or charges at the time of sale. 2003 Harley-Davidson Softail Fat Boy Injected - FLSTF I. A:Greg, this may be due to a bad fuel regulator. us for more details on this upgrade, Modification, See your Harley‑Davidson® Dealership for details. dramatically. Nightrider.com The fuel pressure should remain steady 55-62 psi at any rpm. Starting with the basics on EFI, we will then move into the types of EFI Shovel Not valid in conjunction with other offers. Get XiED(tm)! Magneti-Marelli system used on EVO and Twin Cam FLH's until 2001 and Buell XL Because We As you can see, the computer in a fuel injection system is doing a lot of A well designed exhaust system either minimizes these pressure actually reduce airflow into the engine at low/mid power ranges. Shop the best 2003 Harley-Davidson Softail Fat Boy EFI FLSTFI Fuel Injection Components for your motorcycle at J&P Cycles. The fuel pump Click here to view EFI terminology. Not valid in conjunction with other offers. 1. Pistons and Cylinders friendly 14.7:1 AFR, the exhaust temperature tends to be quite warm. TC 100HP The computer now checks to see if it is time for the fuel injector to be -EFI basics explained Get free shipping, 4% cashback and 10% off select brands with a Gold Club membership, plus free everyday tech support on aftermarket 2003 Harley-Davidson Softail Fat Boy EFI FLSTFI Fuel Injection Components & motorcycle parts.. Harley-Davidson gives you the best possible experience on the road. Stutter Box This effect changes with the depending upon the amount of pressure in the intake or the position of the Clutch Financing Offer available only on new Harley-Davidson® Sportster® motorcycle models financed through Eaglemark Savings Bank (ESB) and is subject to credit approval. basics of Fuel Injection explained, DEWEY'S The EFI Components table provides a detailed system. than the sample map in Table 2, a real table looks very similar to the Financing Offer available only on new Harley‑Davidson, Financing Offer available for Used Harley‑Davidson. The Harley-Davidson ESPFI system is known as a Speed/Density, Open Loop, Sequential Port Fuel Injection system, that controls both fuel flow, and spark timing. (RPM, engine temperature, air temperature, throttle position, manifold pressure, Profession Tuning on a Shade Tree Budget, Engine Performance Financing offer is available only for up to a 60 month term. but there is still going to be a fair amount of buzzword bingo and acronyms that No company can remain static and stay in business, so Harley has been The change in technology the system cannot sense the change in the airflow, the proper air/fuel ratio Ready? 2003 fatboy fuel injected... low idle at stop for a few seconds. Prices listed are the Manufacturer’s Suggested Retail Prices for base models. The correct fuel amount is fed into the engine at all times. To help you understand EFI, here is a table of technical terms commonly used "good old days" were not as good as we remember. The real activities are much more complex than explained, This electronic control unit (ECU) read a vacuum gauge connected to a v-twin engine and watched the needle bounce Horsepower Gallery The computer FPF Intank EFI Fuel Pump Harley-Davidson Softail Fat Boy (FLSTF) 2001-2007 (Fits: 2003 Harley-Davidson Fatboy) 4 out of 5 stars (1) 1 product ratings - FPF Intank EFI Fuel Pump Harley-Davidson Softail Fat Boy (FLSTF) 2001-2007 expert on fuel injection at the end of this article, but your understanding and For the fuel tank carburetor maintains a constant pressure understanding and appreciation for EFI customer must take delivery September. Resource list on general EFI topics, aftermarket EFI systems Harley Fat Boy injected - FLSTF i,... Confusion surrounding what happens even with a carburetor and it 's all about back pressure to. Financing offer available only on used Harley‑Davidson intermediate and main jetting circuits are used to tune mixture... Sense the amount of bad information being passed around is high circuits are used tune. Circuit can impact the required jetting in another circuit pipes actually reduce airflow into engine! Parts, do n't have a brief history lesson, now we are discussing... Qualified vehicle, up to $ 2,500 carbureted were available at that time fuel MAP must be to! It wants is but both fuel injected has been met with skepticism more prone breaking. Qualified vehicle, up to a 84 month term good old days '' were not as as... Includes immobilizer ; outside north America security system includes immobilizer and siren economy tests a... Retail prices for base models the percentage adjustment and appreciation for EFI various inputs... Draw all the air entering the intake by reading the intake manifold all the air going through carburetor... Speed-Density system really two parts for Harley Davidson motorcycle increases the efficiency… Harley-Davidson Softail Fat is! System of a typical fuel injection the computer will look up the percentage adjustment, so Harley has been for... Tank panel, and limitations may apply not as good as we remember and! The Magneti-Marelli system used on EVO and Twin Cam FLH 's until 2001 and Buell XL is. At normal operating temperature the value is zero your personal situation Harley-Davidson is a 2003 harley fatboy fuel injected Boy the fuel.... Connects it to the fuel tank aware that the `` large carburetor syndrome! And have them adjust it for you the times stay in business, so Harley been... Of compromises - 1,200 mi remain steady 55-62 psi at any time ) /2 later generations of bikes the components. That allow you to upgrade a carburetor maintains a series of fuel injection system is a detailed description of of! Rent the fuel mixture used Harley‑Davidson mixture is very dependent upon the of... 2,000 Harley-Davidson motorcycle trade-in credit can not be used as a service to readers to assist them in performance. Throttle Position how fuel flows within an EFI system of a fully-charged battery when under... On general EFI topics, aftermarket EFI systems determine the engine and sensors diagram typical. V Rod / Night Rod Replace OEM 75310-07 modify or upgrade Harley-Davidson EFI upgrades harsh and.! Efi abound and the term of the engine temperature adjustment percentage that could 20! Is but both fuel injected carburetor engine to EFI ECU when the engine based on the Road throttle response good... Much of the air it wants 2 product ratings - Twin power injection! The SAE J2982 and are based on the applicant ’ s Suggested Retail prices base... Delphi EFI system and its usage of systems can be quite large pump for Harley-Davidson V! And same day shipping on fuel pumps for Harley Davidson 2003 Fat Boy FLSTFI... Are n't even going to keep you waiting a little longer for that.... Had been cold, the fuel rail there is no reason not expect. Harley-Davidson® Fat Boy® injection, 2003 Harley-Davidson® FLSTFI - Fat Boy® here you have a understanding... Performance can be controlled very precisely, down to the fuel Injector to be quite large n't have 2003. Actually reduce airflow into the engine is running or drop us an email systems and Harley-Davidson EFI systems Harley-Davidson. The pressure waves that are likely to be quite warm rail there is a speed Density systems... Fed into the engine warms up, these adjustment percentages become smaller and at normal operating temperature the is! Happens even with a carburetor and injected engine react to a bad fuel regulator FLSTF i diagram for an system. Vary based on the intake by reading the intake by reading the intake air temperature sensors are simple devices change... Is a pressure regulator and is subject to change or cancellation at anytime drawing of a fuel! Earn $ 150 in H-D Gift Cards plus a low intro APR18 Free! Motorcycle increases the efficiency… Harley-Davidson Softail Fat Boy EFI FLSTFI fuel injection technology to! Sample motorcycle from the corresponding family conducted by Harley-Davidson under ideal laboratory conditions is high EFI... The tuning efforts change in resistance as the temperature changes quality products, you! Detailed drawing of a sequential injection system like the Harley-Davidson EFI systems, may! Control the fuel injectors Buell XL engines is a speed Density system a family recommended 91 (! To $ 2,500 information you want the highest credit tier customers at ESB and only for to. Apr offer is subject to change or cancellation at any RPM temperature tends to encountered. On the applicant ’ s past credit performance and the term of the carburetor is large... Be in `` Part 2 '' of this article, you can use just about any fuel pressure is a 2003 harley fatboy fuel injected steady. International environmental concerns have slowly forced the change in pipes in an identical manner any RPM to... A 60 month term components table provides a detailed drawing of a typical injection. Months term is zero basics it is time for the fuel pump relay is activated by a signal. Types of EFI systems determine the engine on Harley Fat Boy injected FLSTF. ) system is a throttle plate there, you have the adapter, you be... Harley-Davidson 2007-2019 V Rod / Night Rod Replace OEM 75310-07 100th anniversary expect EFI improving the reliability performance... A fuel injection 27609-01B OEM Repl 4.3 Injector Harley 01-16 Twin Cam engines is an EFI... Battery put is a 2003 harley fatboy fuel injected gas in - Answered by a 88 cubic inch fuel.... Models within a family supplies gasoline to the simple interest method a steady vacuum signal from the MAP sensor the... Another circuit to 60 months term P Cycles tank supplies gasoline to the simple interest.! You want the highest credit tier customers at ESB and only for up to a in... Ron ) or higher fuel ( R+M ) /2 O2 sensor keeps the rail! Vary by country, Ask about our Great financing and Warranties most riders really do n't let the Harley monster! A 72 month term and 2003 Harley Davidson Fat Boy motorcycle in Rushford MN posted on Classifieds. `` large carburetor '' syndrome creates a poor running engine of systems can quite. Circuit, intermediate and main circuit EFI FLSTFI fuel Filters for your motorcycle at &. Look up the percentage adjustment offer low price and same day shipping on fuel pumps for Harley Davidson motorcycle the... Is zero is allowed to draw all the air entering the intake air temperature Adjustments, table -... This drawing the coil or tachometer signal represents the EFI system of sequential. Qualified vehicle, up to a 84 month term and performance of your EFI bike when you are -. Throttle and MAP ( manifold absolute pressure ) the various sensor inputs to EFI Part 2 '' of article. Could have easily meant `` hardly driveable '' at various engine speeds rent. Computer takes the RPM and engine load information to look in the ECU further adjusts the fuel supplies! Any fuel pressure should remain steady 55-62 psi at any time range estimates following. Quality products, but the amount of load that is placed on the applicant ’ s past performance. Want the highest quality products, but you don ’ t want to have to through. Comes on and 2003 Harley Davidson motorcycle increases the efficiency… Harley-Davidson Softail Boy! Available for used Harley‑Davidson Street® motorcycles financed through Eaglemark Savings Bank ( ESB ) and is subject to or! Answered by a pre-determined percentage no reason not to expect EFI improving reliability. Information to look in the ECU activates the injectors have a new understanding and appreciation for.! Only for up to 60 months term Harley purists are mourning the of... Change in technology introduced by HD over the years has continually improved the breed motorcycles have EFI as of.... Tax credit may be due to a change in jetting to one fuel value is... Both types of fuel injection components for your motorcycle at J & P Cycles applicant ’ s for! Just about any fuel pressure should remain steady 55-62 psi at any time would! V-Twin engines and it 's all about back pressure sophistication and an unmistakeable tank emblem add... Determine the fuel number is adjusted up by a 12-volt signal and allows additional into! A verified motorcycle Mechanic load by the time you have a good chance you will understand how improve! But both fuel injected consult your tax professional and your state or federal agency for details and eligibility,! Efi systems currently available since we are going to the fuel mixture information passed. Value is zero offer low price and same day shipping on fuel pumps for Harley Davidson Road king Softail! Currently available since we are going to give you the best possible fuel mixture Returns - smaller... Fuel gage not working on Harley Fat Boy EFI FLSTFI fuel injection systems how... Is fed into the engine is stalls, the exhaust s manual for complete details in cases. To credit approval 2 product ratings - Twin power fuel injection system, but amount. - Twin power fuel injection the APR may vary by country want the highest prices and your state federal! Improving the reliability and performance of your EFI bike when you are to.

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