What kind of EFI system does a Harley Davidson use?
EFI systems that sense engine load by the use of the throttle or TPS (throttle position sensor) are referred to as an Alpha-N system. EFI systems that sense engine load by the use of a MAP sensor are referred to as a Speed-Density system. Harley-Davidson has used both types of EFI systems on its vehicles.
Is there a way to reset the throttle body?
This method is almost foolproof as long as all ECU control parameters are within their normal ranges. Resetting The Throttle Body Calibration (this step is conditional) A Rough Idle or a SES can sometimes be caused by a change in the throttle body position sensor calibration.
When do you need to replace the throttle position sensor?
As soon as you see a mix of these throttle position sensor symptoms, you should test the TPS and if it isn’t functioning properly, it needs to be replaced. Unfortunately, a TPS cannot be repaired as it is a tiny sensor but the good news is that a new sensor “usually” isn’t too expensive so you can get back on the road soon enough.
What kind of EFI system does a twin cam engine use?
The newer Delphi EFI system used on current Twin Cam engines is a Speed Density system. Speed Density EFI systems determine the engine load based on the intake manifold vacuum.
What kind of EFI does a 2000 fltrsei have?
I have a 2000 FLTRSEI that had MM EFI. I got tired of cold start/idle issues that I could not fix. My bike is a different case. Being a factory screaming eagle the program that was flashed to the computer was unique to the FLTRSEI. If I reflashed and ever wanted to go back to stock I would have had to buy anothe ECM fromHD with the FLTRSEI flash.
Is there a trouble free bike with mm EFI?
Magneti Marelli EFI 1999-2001-Does Anyone Here Have A Trouble Free Bike with MM EFI? I’m the original owner of a 2000 FLHTCUI and it was trouble free until this year, now I’m having issues with the MM EFI system and It’s starting to cost me money and aggravation chasing the EFI problems.
Is it possible to repair a Magneti Marelli EFI?
Because the MM EFI systems are so difficult and expensive to repair it seems that the path of least ressitance is to replace it with a carb, not my first choice but it’s looking like my best option.
What kind of problem do you have with your EFI?
I have never had any single problem. 2001 Road King Classic. About 50.000 miles. My EFI works good. Recalibrated with DFO. Recent inspection of the clutch: almost like brand new. Recent inspection of the belt: almost like brand new. What kind of a problem you have on your mind exactly? .. . I have a 2000 FLTRSEI that had MM EFI.
When to use open loop fuel injection on Harley Davidson?
Since Harley only uses narrow band sensors (NBO2) capable of only a very narrow range of Air/fuel ratio (AFR), the ECM can only control the mixture under cruising or very low load conditions. Under all other conditions the ECM switches to Open Loop as described in this article.
Can You tune a closed loop O2 engine?
Most stock and aftermarket ECU’s allow you to tune the adjustability of closed loop o2 operation. If you have hacked into the stock ECU to change calibrations then this might be more difficult to tune, but on most aftermarket ECU’s it is very straight forward. Some of the options you will have the ability to change are: 1.
How does a self adapting EFI system work?
All of the self-adapting EFI systems use a wide-band oxygen sensor placed roughly at the header collector, downstream in the exhaust system. The sensor reads the exhaust gas and the engine control unit – the computer (ECU) uses the information as feedback to the tune.
EFI systems that sense engine load by the use of the throttle or TPS (throttle position sensor) are referred to as an Alpha-N system. EFI systems that sense engine load by the use of a MAP sensor are referred to as a Speed-Density system. Harley-Davidson has used both types of EFI systems on its vehicles.
What happens when the throttle gets stuck in an open position?
When the throttle gets stuck in an open position than your vehicle will receive too much air and cause it to have a high or fluctuating idle. What are signs of a bad Throttle Position Sensor? Acceleration issues: A bad TPS may cause all sorts of power issues. Your engine may start up but it will have little to no power and it causes it to shut off.
Can a bad throttle position sensor cause idle surging?
Idle surging can be caused due to other issues in the car, but if it happens in conjunction with other throttle position sensor symptoms, the culprit is often the TPS. At idle, the ECM will not get the correct information and the throttle will variate randomly causing idle surges. 3) Check Engine Light
Where does fuel injection on a Harley Davidson come from?
The mighty Harley is slowly loosing its carburetor. 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. International environmental concerns have slowly forced the change from carburetor to electronic fuel injection.
What kind of engine does a Harley Davidson VRSC have?
The Revolution engine. In 2008, the 1,247 cc Revolution Engine became standard for the entire VRSC line. Harley-Davidson claims 123 horsepower (92 kW) at the crank for the 2008 VRSCAW model. The VRXSE Destroyer is equipped with a stroker (75 mm crank) Screamin’ Eagle 1,300 cc (79 cu in) Revolution Engine, producing over 165 horsepower (123 kW).
What kind of tire does a Harley Davidson VRSCDX have?
The VRSCDX is marketed as the factory made custom version of the standard Night Rod and is also part of Harley-Davidson’s “Dark Custom” series. In addition to a 240 mm wide rear tire, most of the chrome components of the VRSCD were replaced with black.
How can I tell if my Harley Davidson has a fuel problem?
Check for intake gasket leak. Spray wd-40 around intake at jugs.See if you get any change in rpm. Could this be a venting problem? Once the engine starts to sputter how long before you can start it and have it run another mile?
Why does my Softail Deluxe bike run weird?
Mine would do the exact same thing, its a 2007 softail deluxe. It turned out the battery to be the problem. The reason its intermittent is the bike will start running weird in other words it would take a charge but if for some reason that charge did not hold for long the bike will start running weird again.
Why does my Harley Davidson have no fuel pump?
If battery static volts measure 11.6v or less with the ignition on the ECM won’t energize the system. am not getting any voltage at the 15 amp fuse at key on, also have battery charger on while testing. engine cranks at good speed. are there more powers and grounds at the battery then just the main positive and negative battery cables?
Can a faulty EFI cause an engine stumble?
With computer controlled EFI, the computer or any of its sensors or actuators can go faulty, and when this happens you can get, you guessed it- incorrect ignition and incorrect fuel/ air mixture for the required operating condition, thus engine stumble. Here is the list of items on the 90+ that can be sources of this problem (no particular order):
Why did my Harley Davidson die in the driveway?
After about 15 mins she showed up and said her bike would not stay running. At each stop, it would stall but would always start after the fact. It died in the driveway.
Mine would do the exact same thing, its a 2007 softail deluxe. It turned out the battery to be the problem. The reason its intermittent is the bike will start running weird in other words it would take a charge but if for some reason that charge did not hold for long the bike will start running weird again.
What to do when your EFI goes bad after a new exhaust?
However, if the condition came about after you changed your exhaust or intake, you may want to look into it. Make sure you are using premium fuel. Try to think if the condition came on gradually or suddenly. That might help pinpoint when something changed and be a clue as to how to address the issue.
When did electronic fuel injection ( EFI ) work?
All that changed when the first motorcycle pollution laws were enacted in 1979. Initially, most of the OEM’s simply leaned out their jetting, but that led to other problems, and it soon became obvious that a better solution was needed. Initially, it looked like improved carburetors might be the answer and for a time it was.
Are there any downsides to alpha-N EFI?
The downside to a pure Alpha-N system is that it’s not the most precise form of EFI on the market and because of that, fuel economy and at times power output may fall short when compared to some of the more sophisticated systems.
Do you need to remap your Efi after a new exhaust?
I BOUGHT A NEW HD STREET GLIDE SPECIAL. ON THE BIKE IS A UP TO DATE AIR CLEANER AND A SET OF SCREAMIN EAGLE PIPES AND THE SYSTEM WAS MAPPED. DO YOU THINK THAT I SHOULD RE-MAPP WHEN I GET A NEW SET OF SLIPP -ON’S?
How to install Holley sniper EFI fuel injection?
Place the Sniper EFI throttle body on top of the new flange gasket on the manifold. Using the correct length carb stud and nuts, tighten the Sniper EFI throttle body down progressively in a “criss-cross” pattern (60-80 in.lbs.). 3. Install the throttle linkage to the Sniper EFI throttle body.
What should fuel pressure be on sniper EFI?
Within 2-feet of sending unit is recommended. Once the fuel system is installed checking the fuel pressure on the inlet side of the Sniper EFI is recommended, fuel pressure needs to be between 55-65 PSI. TOOLS REQUIRED FOR INSTALLATION
When did Harley Davidson start shipping Sportys with EFI?
Starting in 2007, all Harley models are shipped with EFI, including Sportys for the first time. The impetus for migration to EFI is to meet the more demanding federal emissions standards intended to take effect in California in 2006 and in 2008 for the other 49 states.
Why are liquid cooled engines used on Harley Davidson?
Depending on the bike, you may replace used Harley engines and transmissions. Liquid-cooled engines are mostly used to reduce heat and improve performance. It’s the number one reason you see these engines on sports bikes. On most cruisers like Harley, air-cooled engines are practical because these bikes run on less RPM, dissipating less heat.
Where is the ECM located on a Harley Davidson?
The ECM uses the inputs from this sensor to help calculate how much air is entering the engine. It’s located in the intake manifold on top, just behind the throttle body. IAT – Intake Air Temperature – This sensor provides input signals to the ECM as it reacts to the temperature of the air entering the engine.
Depending on the bike, you may replace used Harley engines and transmissions. Liquid-cooled engines are mostly used to reduce heat and improve performance. It’s the number one reason you see these engines on sports bikes. On most cruisers like Harley, air-cooled engines are practical because these bikes run on less RPM, dissipating less heat.
The newer Delphi EFI system used on current Twin Cam engines is a Speed Density system. Speed Density EFI systems determine the engine load based on the intake manifold vacuum.
Is the Harley Davidson fltrx in good condition?
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