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Re: Truck broke down wont start.
There is no Inercia Switch to reset Like Ford Have you Double Checked All Underbody wiring for fuel pump ,OPEN In Pink/blk tracer fuel power lead,also Oil Sending unit on most GM Vehicles have the ability to turn OFF GROUND to Fuel Pump Relay as a Proyection Against LOW OIL Pressure in engine.
Fuel Cutoff Mode The PCM cuts OFF fuel from the fuel injectors when the following conditions are met in order to protect the powertrain from damage and improve driveability:
The ignition is OFF. This prevents engine run-on.
The ignition is ON but there is no ignition reference signal. This prevents flooding or backfiring.
The engine speed is too high, above red line.
The vehicle speed is too high, above rated tire speed.
During an extended, high speed, closed throttle coast down-This reduces emissions and increases engine braking.
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Did you check the fuel pump pressure on the old pump before removal? Did you change the fuel filter before removing the old pump? Did you check to see if you could hear the old pump running when you turned the key on? Did you check the fuel pump relays or fuses? Did you check to see if you have power going to the fuel pump at the fuel pump electrical connector, on the Wire harness side of the connector? Make all of these same checks for the and on the new pump. for a gas engine also make sure you have good spark to each spark plug. Good Luck and have a good XMASS. From Ernie at RedDeer, Alberta, Canada.
when you turn the key in 'on' position, do you hear the fuel pump hum? check under hood in black box,,fuses,,and relays. for bad fuse or fuel pump relay bad. try bumping fuel tank with something hard to see if fuel pump will engauge with key on. maybe bad pump. have you had off road? look for pulled plug from fuel pump underneath near gas tank.have you bent or damaged your igbition key somehow? the key sends a signal to your cars computer to engauge the pump and crankshaft sensor.but if you do have fire,,,it's a fuel problem, so you are on the right track. if nothing i've said helps, check for a bad fuel pressure regulator.hope this helps and thank you for choosing fixya.com!!
You could have a bad fuel pump relay switch. The fuel pump
relay switch gets the fuel pump running in the vehicle during the start
cycle. The terms fuel pump relay and fuel pump relay switch are used
interchangeably. The fuel pump relay begins its job when the automobile
operator turns to the ignition on, but before the motor is actually
running. At that point, the fuel pump relay in some cars sends a signal
to the ignition switch, which in turn sends a signal to the fuel pump
to turn on. Others fuel pump relays have actual circuitry inside of
them that receive the ignition signal and directly signal the fuel pump