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.
Are there any misconceptions about fuel injection?
Many mechanics and most riders really don’t have a good idea on how EFI works and how the primary components interact. Misconceptions about EFI abound and the amount of bad information being passed around is high. By the time you have finished this article, you should be thoroughly confused or have a new understanding and appreciation for EFI.
What does premature ignition on a Harley mean?
Premature ignition, also called pre-detonation, occurs when the air-fuel mixture in your engine starts to burn before it should. Ideally, the fuel should burn only when the spark plug produces a timed spark in the engine. However, other elements in your engine can cause the fuel to ignite ahead of time.
How does an electronic fuel injection system work?
In its simplest terms, an electronic fuel injection (EFI) system is a computer controlled fuel delivery system. This electronic control unit (ECU) reads various sensors located on the vehicle and makes the determination of how much fuel to allow the engine to have based on this information.
What causes detonation on a Sportster engine?
The detonation problem with Sportster engines seems to stem from an improper advance curve. In Buzz Buzzelli’s book on Sportster Performance, he describes the problem in detail.
When did fuel injection become standard on Harley Davidson motorcycles?
Fuel injection became standard on all Harley motorcycles in 2008. By this time, no model in the Harley-Davidson was carburetted. The EPA mandated motorcycle manufacturers to use EFI on their bikes because fuel injection had more control over the air-fuel mixture than carburetion. It can decrease the motorcycle’s total emissions.
Is the stock 883 engine prone to detonation?
From stock 883 through extensively modified 1200’s, the Sportster engine is prone to detonation. Can the problem be eliminated or minimized? The detonation problem with Sportster engines seems to stem from an improper advance curve.
Premature ignition, also called pre-detonation, occurs when the air-fuel mixture in your engine starts to burn before it should. Ideally, the fuel should burn only when the spark plug produces a timed spark in the engine. However, other elements in your engine can cause the fuel to ignite ahead of time.
What are the sensors in a fuel injection system?
The electronics and Sensors diagram is typical wiring diagram for an EFI system. Some EFI systems may have more or fewer sensors than this drawing. This represents a typical fuel injection system. The engine and air temperature sensors are simple devices that change in resistance as the temperature changes.
Can a Harley Road King be converted to a carbureted?
This article will cover the latter where one of our customers “Nils” converted his 2000 Harley Road King from a Magneti-Marelli Injection system to a 2000 Road King Carbureted model. Should you have any question for Nils, please contact us and we will forward your request. 2. Objective
Why did my Harley Road King start cutting out?
Would be great for a while and suddenly start cutting out. Found a bad wire on the start relay under the seat. Harley Mechanic said that was probably not the issue but replaced the relay, changed the wire connection and hasn’t missed a beat in two years. The wire that you found that was bad on that 2002 road king under your seat…
Where is the bad wire on a 2002 CVO Road King?
The wire that you found that was bad on that 2002 road king under your seat… Was that right beside the battery or do they have something to do with a relay near the battery? I have a 2002 CVO road king with a stage three stroker kit installed. When the dealership install the package the bike ran fine for period of time.
What kind of motor does a Harley Road King have?
I have a 2002 CVO road king with a stage three stroker kit installed. When the dealership install the package the bike ran fine for period of time. Now the bike will miss occasionally and cut off at low idol just after a miss occasionally.
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 Fat Boy have?
2005 Harley Davidson FLSTFI 15th Anniversary Fat Boy. The 15th Anniversary Edition Fat Boy commemorates the model’s journey with an extra helping of chrome, performance and style. A big bore, fuel-injected 1550cc Twin Cam 95 engine delivers strong roll-on power with just the right amount of feedback to the rider.
How many EFI conversion kit are there on Amazon?
Only 14 left in stock – order soon. . Only 5 left in stock – order soon. . Only 3 left in stock – order soon. . Only 8 left in stock – order soon.
When did I get my Fat Boy bike?
Got the ’05 Fat Boy in September, and have put 1000 miles on her as of today. I have ridden interstate, city, and winding mountain roads. The lean angle means taking corners slow, but it’s a look-cool bike, not a crotch rocket!
Many mechanics and most riders really don’t have a good idea on how EFI works and how the primary components interact. Misconceptions about EFI abound and the amount of bad information being passed around is high. By the time you have finished this article, you should be thoroughly confused or have a new understanding and appreciation for EFI.
Can a pin hole in a fuel line cause a problem?
Typically if the problem is the result of a pin hole in the fuel line in the tank, the problem will not exhibit on a full tank. Once the fuel level drops below the hole, the problem exhibits. Check fuel pressure.
What kind of fuel injection does a Delphi motorcycle use?
For 2006 HD Dyna model bikes and all 2007> later HD motorcyles, the Delphi fuel injection now operates in closed loop mode with a pair of narrow band O2 sensors. The NBO2 sensors control the fuel mixture when idling and cruising.
For 2006 HD Dyna model bikes and all 2007> later HD motorcyles, the Delphi fuel injection now operates in closed loop mode with a pair of narrow band O2 sensors. The NBO2 sensors control the fuel mixture when idling and cruising.
Why does the exhaust on a Harley backfire?
The exhaust on a Harley is properly tuned from the factory to function coherently with the engine. As soon as the third-party part or an upgrade is performed on the Harley, it starts behaving unpredictably. This can be in the form of a misfire when starting the engine or backfiring.
When did closed loop fuel injection come out?
Closed loop operation was introduced with the 2006 Dyna model and all other models in 2007. Sequential Port Fuel Injection – Injector nozzles are positioned in the manifold near the intake valve and are precisely timed to deliver fuel to each cylinder.
What causes a motorcycle exhaust to turn red?
This condition where the bike does not get enough fuel and too much air can cause a furnace effect. This will generate more heat, with a glowing exhaust as the most visible consequence. Another possible consequence of running the bike in this condition is that it will burn a hole in your aluminum piston over time.
How does the fuel pump work on a Harley Davidson?
The fuel pump provides a high pressure feed to the fuel rail that contains the fuel injectors. On the fuel rail there is a pressure regulator that limits the fuel pressure to 39-45 PSI and maintains a constant pressure. The pressure regulator has a vacuum line that connects it to the intake manifold.
Can a fuel injector last the life of the engine?
In general, fuel injectors are hard wearing and with a little care, can often last; the life of the engine. Like any other engine part, regular maintenance is the key, to keeping them going.
When to replace fuel injector seals and washers?
If the O-ring fitted to the injector is the problem; then replacing this O-ring will usually fix the leak. If the injector body; nozzle or internal components are cracked; then a new or refurbished injector is your only option. Replacement fuel injector seals and washers are cheap and are, fairly easy to install.
What should fuel pump pressure be at idle?
Pump capacities can always be higher than specifications, but should never be lower. So if you get a pump that is flow rated at 0.4 gpm and you install it in a vehicle that requires 0.5 or 0.6 gpm, the pump may supply enough fuel at idle and low rpm, but may starve the engine at higher loads and speeds.
What happens if there is not enough pressure for fuel injection?
This can leave the air/fuel mixture too lean, causing the cylinder to misfire. According to Jim Linder of Linder Technical Services (a provider of fuel injection training) in Indianapolis, IN, fuel pressure is probably the most critical factor in the fuel injection system.
Can a hard line be used with EFI?
Looking to use Mostly hard line with flex at carb and tank, have short pieces of efi flex hose & efi hose clamps and wasn’t sure if hard line would need some type of flare to prevent leaks? I suppose you could just slide the hose over the line and clamp it but it would look like crap.
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.