My Dad's 92 GMC Sierra was running rough for about a day then it shut down and would'nt start back up. It is a 4.3L Throttle body injection egine. I am used to multi port fuel injection and checking the fuel pressure on the valve on the fuel rail. When removed the air filter and had him try to start it I didnt see ANY fuel coming from the injectiors (there are 2 of them). I'm assuming it would be a fuel pump problem but I dont know much about these trucks. I listened for a fuel pump in the tank and did not hear anything.
Is the fuel pump in the tank?
Is there a fuel pressure regulator or anything else that could cause this problem?
**** The voltmeter in the truck shows slightly low voltage even with new battary.*****
Could it be the electrical signals that tell the injectors when to fire?
Is the fuel pump in the tank?
Is there a fuel pressure regulator or anything else that could cause this problem?
**** The voltmeter in the truck shows slightly low voltage even with new battary.*****
Could it be the electrical signals that tell the injectors when to fire?