Where is the Red ECM plug on a fuel pump?
I traced the Pin 85 bl/gr wire to Pin 9 on the Red ECM plug and confirmed that there is continuity, which is no surprise since it works half the time.
Why do I have a problem with my fuel injection pump?
Fuel injection problems, therefore, are one of the most pressing engine issues to deal with. Whether you’ve experienced fuel injector failure or not, it helps to understand the fuel injector pump, how it relates to engine performance, and also how diesel fuel injection pumps differ from traditional gasoline-powered units.
When to replace fuel injectors in a car?
This should give the engine enough fuel to run long enough to see if the injectors are working correctly. If they are not, have them all replaced at once instead of just the bad ones as this is a beneficial maintenance practice. Once the problem has been properly diagnosed, your engine should be running again. Was this answer helpful?
What’s the pressure of a diesel injector pump?
Today’s diesel fuel injection pumps are under pressure – even more pressure than what was once considered “normal.” Around 15-20 years ago, it was common for fuel injector pumps to process fuel in a system at around 10,000 to 15,000 psi (pounds per square inch). But that’s only about half of what engines are expected to do today.
Is there an ECM signal to the fuel pump relay?
The fuel pump relay works as it should. I always have power to Pin 30. I believe the ECM tells the relay to work via the green/black wire to Pin 85. This should happen for 2 seconds when the key is turned on. I have tested this when the issue is occurring and have confirmed that no signal is being sent from the ECM.
What to do when your fuel pump doesn’t work?
Sometimes, the fuel gauge does work when the fuel pump isn’t; however, after a couple key turn-ons, it usually fails too. Most of the time, if I leave the key in the On position, after several seconds to a few minutes, it will all of the sudden prime and the gauge comes alive.
What does it mean when your fuel pump doesn’t Prime?
For a couple years, my truck has had an intermittent no start issue characterized by the fuel pump not priming. Most of the time when this issue is occurring, the fuel pump doesn’t prime and the fuel gauge is buried on E.
Is there a way to make a fuel pump run?
I can make the pump run by using a jumper at the relay and by utilizing the Prime test slot; however, even when the pump is running continuously via the jumper, the truck will not start – just cranks. I’ve tested every fuse I have inside the cab and under the hood. I’ve checked grounds.