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When the ignition move is ON, the PCM activates the in-tank fuel pump. The fuel pump continues to be ON as long as the PCM receives referral pulses native the ignition system. If there room no recommendation pulses, the PCM transforms the fuel pump turn off after about 2-3 seconds. The pump it is provided fuel to the fuel rail and also injectors, then to the push regulator, wherein the device pressure stays 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 revolve ON the fuel pump
I have actually a 5.3 engine and its gettin no fuel, checked all fuses and relays and beleive to every be good.I experiment them by an altering out the relay with one more one alongside it since there the same and all the fuses room good, currently I ordered a pump off ebay brand new,but it didnt come through a black color module on height of pump,just a hole for my old one,i think its called a press switch or push sensor,I am not gettin fuel still,I not hear a noise within fuel tank. I tested old pump through hooking wires directly to battery and also it works, therefore what deserve to be wrong,can it it is in the pressure switch because it my old one? Is this what that is called? or is there something rather i have to be checking, thank you in advance Doug
Hello, the pcm powers the fuel pump relay, thus powering the fuel pump. Have you confirm the ecm b fuse 20 amp. This fuse is strength for one next of the relay, climate the pcm strength the control circuit that the relay. The relay likewise has one ground. In order because that a relay come work, friend must have one power feed, one soil circuit, and also one manage circuit. In your instance 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 continues to be ON as long as the PCM receives reference pulses native the ignition system. If there are no recommendation 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 also injectors, then to the pressure regulator, where the mechanism pressure remains at 379-427 kPa (55-62 psi) if the fuel pump is running. Overabundance fuel returns to the fuel tank. As soon as the engine is stopped, a scan device in the output controls function can rotate ON the fuel pump
I had actually a similar problem and similar solution as above:Update. I had the battery disconnected from critical night. (i was having actually a security light flashing and thought this could be a passlock issue) ns was cautious to reconnect tonight and also my security light go away. Therefore I removed that possibility and also moved come the next...the ignition switch. Ns pulled apart the column and looked around, but found no corrosion. Tho not gaining power come the fuel pump relay. Acquired in bed to proceed google searching and also came throughout someone who had actually a poor ecm b 20amp fuse in the underhood area. Checked mine and also it looked ok. Began checking all fuses the surround the fuel pump relay and many more. Discovered 2 bad fuses. Readjusted them and VIOLA!!!! expect it can be as easy for some of you likewise experiencing this issue.
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