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When the ignition move is ON, the PCM activates the in-tank fuel pump. The fuel pump remains ON as lengthy as the PCM receives reference pulses indigenous the ignition system. If there room no reference pulses, the PCM transforms the fuel pump turn off after about 2-3 seconds. The pump it is provided fuel come the fuel rail and injectors, then to the press regulator, wherein the system pressure remains at 379-427 kPa (55-62 psi) while the fuel pump is running. Overfill fuel return to the fuel tank. As soon as the engine is stopped, a scan tool in the output controls function can rotate ON the fuel pump
I have a 5.3 engine and also its gettin no fuel, checked all fuses and relays and also beleive to all be good.I experiment them by transforming out the relay with another one beside it since there the same and also all the fuses are good, now I bespeak a pump turn off ebay brand new,but it no come through a black color module on peak of pump,just a hole because that my old one,i think its referred to as a press switch or press sensor,I am no gettin fuel still,I dont hear a noise inside fuel tank. Ns tested old pump by hooking wires directly to battery and also it works, for this reason what deserve to be wrong,can it be the pressure switch since it mine old one? Is this what its called? or is over there something else i should be checking, give thanks to you in breakthrough Doug
Hello, the pcm strength the fuel pump relay, for this reason powering the fuel pump. Have you confirm the ecm b fuse 20 amp. This fuse is power for one next of the relay, then the pcm strength the control circuit of the relay. The relay likewise has one ground. In order because that a relay to work, friend must have one strength feed, one soil circuit, and also one manage circuit. In your situation the pcm.the ecm b fuse is in the underhood fuse block!!!
is ON, the PCM activates the in-tank fuel pump. The fuel pump remains ON as long as the PCM receives referral pulses indigenous the ignition system. If there room no reference pulses, the PCM transforms the fuel pump turn off after around 2-3 seconds. The pump it is provided fuel to the fuel rail and also injectors, then to the push regulator, where the system pressure stays at 379-427 kPa (55-62 psi) while the fuel pump is running. Overfill fuel returns to the fuel tank. When the engine is stopped, a scan device in the calculation controls function can rotate ON the fuel pump
I had actually a comparable problem and similar solution together above:Update. I had actually the battery disconnected from critical night. (i was having actually a protection light flashing and also thought this could be a passlock issue) i was careful to reconnect tonight and my security light go away. For this reason I removed that possibility and moved come the next...the ignition switch. I pulled apart the column and also looked around, however found no corrosion. Tho not gaining power come the fuel pump relay. Obtained in bed to proceed google searching and also came throughout someone who had actually a bad ecm b 20amp fuse in the underhood area. Confirm mine and also it looked ok. Started checking every fuses that surround the fuel pump relay and many more. Uncovered 2 negative fuses. Readjusted them and also VIOLA!!!! expect it might be as simple for few of you also experiencing this issue.
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