1996 GMC Jimmy Repair Question
Mileage: 250,000 miles.
96 4.3l fuel injection issue<
Asked by donnie7Answer
any codes??? what is the exact fuel pressure?? there is 1 12 volt feed to all injectors and the return to the pcm is toggled.
Roy
I did not get any number codes just flashing CAT o2s EGR HTR and EVA can't get a running fuel pressure.. Before it was 2 psi running so I replaced the pump tank and filter,, what will cause two injectors to have a constant power whe ignition is on
Might have a bad computer, where did u get the crank sensor? And what was the fuel Pressure after u changed the pump?
The sensor is a BWD .. With power pulsing at each injector is right what else is controling fuel flow .. I'm testing the fuel pressure in the morning.. That pressure should be 43 - 56 psi not running ,, running it should drop to 3-10 psi is that correct
Just asking how would the crank shaft cut off fuel completly?? And can you tell me what the letter codes mean that I got
pressure should be 55-62 minimum.
what side of the injectors are you measuring?? there should be 12 volts all the time to the injectors. the return to the computer are what is toggled.
flashing check engine light is a missfire code. you did not list this in your findings.
Roy
The check ingine light is solid not flashing and I'm testing the conection at the top of the meter body going one by one with test light cranking it over for each..
Also this the CSEFI so I'm testing at the electrical conection I have not removed the plenum yet but like I said with test light I get strobes to all injector should it show a constant light for all when ignition is on...
no, it should be toggled by the computer according to load.
Roy