Question about 1992 GMC Sonoma
I have replaced the fuel pump , the sending unit and fuel filter, but once the truck gets just past the warm on the temprature gauge it starts to chug leaving from a dead stop. I have to feather the gas pedal to leave a stop sign and it seems to surge on and off once im moving.
Its the EGR valve. My personal solution was just to disconnect the vacuum line from the EGR solenoid. Take the breather off. Looking at the motor from the front of the truck, look to the left of the throttle body(injectors) and find a small electronic device with two vacuum lines attached to it. Take the vacuum line on the very back and unplug it.
Posted on Apr 17, 2009
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Posted on Jan 02, 2017
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If your oil pressure gets to low it can turn off the fuel pump. This may also have saved your engine. The ECM turns on the fuel thru the fuel pump relay for about 5 seconds. When engine is running oil pressure sender supplies the voltage to the pump. When engine shuts off check oil pressure and voltage to fuel pump.
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