motorcycle fuel injection problems

So before going into balancing throttle bodies, maybe it’s worth taking it to a shop who can design a custom map for you to smooth out the torque curve. Fuel Injection problems. Browse other questions tagged motorcycle fuel-system fuel-injection or ask your own question. The result of eliminating the O2 sensors is that the motorcycle is always in open loop mode. RB Racing is the only motorcycle fuel injection company that designs and manufactures its own electronic controls, software, throttle bodies and wiring harnesses Motorcycle Fuel Injection Note: As of June 2018 these are no longer being shipped or manufactured by RB Racing. Jun 1, 2015 | Comments; Most of the bikes plying on the road today still use the good ol’ carb. Harley-Davidson Fuel Injection basics It is a sad day in Hogville. If the engine does not get enough fuel sprayed into due to a clogged injector, then the engine will misfire as you drive. The engine is trying to use as little fuel as possible. Unlike carburettors, which often need readjustment, fuel injection systems require minimal maintenance as long as all the electronic components are in working order and the system is clean. I haven't had much luck in the past using the search feature here, so I do google searches of topics from this site only: I bought a Honda 1980 XL500S scrambler a few months ago and absolutely love this old bike. Buying the 12 port injector and the ECU may not solve the problems without having some sort of fuel injection tuner like the JD or PC. The ECU is trying to lean out the mixture as much as possible without damaging the engine, using inputs from the lambda sensor about how well the fuel combusted — as well as other inputs (see below). My feeling is that it may have happened in a start up a few days ago. The tuning also targets different things. For the most part, motorcycles and carburetors have come to a parting of the ways. This will result in higher fuel consumption and emissions. I ride an '06 Streetbob with a stage 1 upgrade and recently have had a problem with my rear cylinder. This can be done by adding a fuel system cleaner to your vehicle’s fuel tank and working it through the system. This is how often fuel is combusted in your motorcycle engine for an average given engine speed in RPM: (…or some other number if you have a triple or a behemoth of a six-cylinder motorcycle. The consequence of this is a weak spray and uneven pattern. Turning this screw clockwise will reduce the amount of air entering the carburetor, and will, therefore, richen the mixture (refer to a shop manual for correct settings). Now the symptoms are back again- OK acceleration, but misses during steady speed, fuel mileage down, backfires and pops. In open loop mode, it doesn’t! The first way is to reprogram the motorcycle’s ECU. Find a Dynojet Power Commander for your bike on Amazon. Below I’ll explain this in more detail, including when a motorcycle is in closed loop vs open loop, and how it affects the way you ride. However, we were able to overcome these problems and develop a system Too bad, sucker, here’s your fuel! The small controlled fuel enrichment with the BoosterPlug will solve the common fuel injection problems and make your motorcycle … Motorcycle Fuel Injection Handbook Paperback: 159 pages Dimensions (in inches): 0.38 x 10.60 x 8.22 Publisher: MBI Publishing (July 1, 2004) ISBN: 076031635X I absolutely love books like the Motorcycle Fuel Injection Handbook! loss of power and missing. Oh, the mixture’s too rich? Repair or replace frayed fuel injection wiring harness? But what people often do is remove them and remap the ECU to prevent the error from showing up. A sensor closes the loop. 25 power strokes per second means 25 combustions on a single. But considering everything fuel injection is the best solution for most of the kind of motorcycles. But considering everything fuel injection is the best solution for most of the kind of motorcycles. I don’t want to lead you astray and so I don’t want to guess haphazardly. Manufacturers do this because they want to pass emissions regulations, so have to keep combustion efficiency high. If the engine does not get enough fuel sprayed into due to a clogged injector, then the engine will misfire as you drive. Electronic Fuel Injection (EFI) is now standard equipment on almost every street motorcycle manufactured around the world. This happens when: When you operate the motorcycle at a constant speed (constant load, constant throttle), the ECU switches to closed-loop mode. Lots of oxygen makes the lambda sensor’s fuel cell put out low voltage (0.2V), and little to no oxygen makes it put out higher voltage (0.8V). RB Racing is the only motorcycle fuel injection company that designs and manufactures its own electronic controls, software, throttle bodies and wiring harnesses Motorcycle Fuel Injection Note: As of June 2018 these are no longer being shipped or manufactured by RB Racing. There are a number of ways of applying a custom map to an ECU — well, three main ways. But now more and more two wheeler companies are looking into fuel injection as an option in their bikes simply because it is the new tech that has come up. The way the computer thinks about this is its fuel map (see the picture above). My wife thinks I'm nuts, because this Although fuel-injection can be quite a complex system at the design and engineering level, in concept, it's actually pretty simple. Even though fuel injection and combustion is happening hundreds of times a second, the lambda sensor is an analogue, organic device. For more fuel injection topics try searching for replies by Mfolks. Sometimes, motorcycle owners just eliminate the sensors. If there’s one thing I want you to take away, it’s this: closed loop is about saving fuel and being environmental, and open loop is about performance and responsiveness. small-motorcycle fuel injection systems. 4. Hello good guys, I’m in a car team and in a few days we’ll start with engine bench sessions. Discussion Starter • #1 • Jul 21, 2007. The fuel pump should run long enough to pressurize the fuel rail if this is what is keeping it from starting. These are an interface between the oxygen sensors in the exhaust and the ECU. That's what I'd do for you. When conditions stabilise, for example, if the throttle is returned to a low position and the RPM is constant, then the ECU will switch back to closed-loop mode. Your email address will not be published. I have plenty of spark, but no fuel getting to the rear cylinder. Either way, you’ll want to take care of the problem soon or the engine will be susceptible to overheating or other problems that occur when the proper air/fuel … the accelerator is on!” and switch to open-loop mode, relying on the fuel map instead. And you will usually not be able to adjust the idle level in any way. If you were building an all-out gas guzzling race machine, you wouldn’t need closed loop at all. The inputs used vary from motorcycle to motorcycle. If the computer observes the same conditions for a second to a few seconds, it thinks “hey, things seem stable enough” and it switches from open-loop to closed-loop mode. There's a big likelihood that your fuel injectors are clogged if you see most of these problems happening in your vehicle. The BoosterPlug fuel injection tuning kit is designed to eliminate the usual fuel injection problems that haunts all modern motorcycles. Opt-in alpha test for a new Stacks editor. I have also replaced the plugs. Different motorcycles obviously have different fuel maps. The people who tuned the engine — usually the engineers who built the thing, but sometimes an aftermarket tuner — figured out how much fuel it needs at different combinations of those variables to make the motorcycle respond well. Start the engine when cold and let it run at idle for 5 – 10 seconds. But how much of each do you need? A quick peek into the motorcycle's fuel tank, specifically at the tank's inner metal lining, can reveal problems that may be hidden beneath an otherwise perfect exterior. This circuit allows for a rich mixture while cold, think of it as a computer controlled choke. I love learning and sharing what others might find useful. While a few carburetor-equipped bikes are still on the market, the vast majority of street bikes are now equipped with some form of electronic fuel injection, which despite the complication it adds, is both a better way to go, and undeniably here to stay, protests from the Luddites notwithstanding. So even with 100 firing events a second, you’d get far fewer feedback points a second — but still enough for your computer to operate as lean as possible. If I put the software back to standard (O2 sensor on) the issue disapears. Not quite as often as how often fuel is injected and combusted, but quite a lot. For example, if you’re idling and the sensors are warm, you’ll be in closed-loop mode. In the late 1970’s Kawasaki Z1000G-1 Classic was a … Motorcycle engines are still basically using computer controlled carburetors mounted to individual intake runners. Hence after learning both the advantage and disadvantages of carburetor vs fuel injection system you can see both of them have different advancement and weaknesses. This week it’s Kawasaki's introduction of the first motorcycle fuel-injection system. Motorcycle Fuel Injection Handbook Paperback: 159 pages Dimensions (in inches): 0.38 x 10.60 x 8.22 Publisher: MBI Publishing (July 1, 2004) ISBN: 076031635X I absolutely love books like the Motorcycle Fuel Injection Handbook! There's a big likelihood that your fuel injectors are clogged if you see most of these problems happening in your vehicle. The sensor in question is a lambda sensor, also known as an oxygen sensor or air/fuel ratio mixture sensor. In a nutshell, closed loop is where the engine operates with a feedback loop. But you’d use a lot more petrol and you’d never pass ever-tightening emissions standards. In open-loop mode, the engine relies mostly on a fuel map to understand how much fuel to add to the engine. They will reset the AFV, CMP, IAT, and check your milla seconds pulse width. Motorcycle engines are still basically using computer controlled carburetors mounted to individual intake runners. Required fields are marked *.

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