My fuel pump is whining very loud and continuously when engine is running. Sounds normal when I turn the key on and let it prime but when I crank it.....wow! Pump 1 yr old! Anyone????????

My fuel pump is whining very loud and continuously when engine is running. Sounds normal when I turn the key on and let it prime but when I crank it.....wow! Pump 1 yr old! Anyone???????? 3 Answers

04 gmc sierra 1500 5.3 died on me on the highway got it towed home starting going at it, hooked two different scanners to it and not throwing any codes (ecm is working bc the map was reading correctly but also the rpm was zero) anyways checked fire none checked injectors they wasnt working either(built fuel pressure then unplugged fuel relay then turned engine over and the pressure stayed the exact same) i assume it might be the crank sensor but i would think it would throw a code, anyways came back this morning and before doing anything for the hell of it i checked the gas cap and tightened it and it fired up perfect three different times and the last time i let it run and it died after bout 45 seconds (fuel pressure reads 55) and after it died its doing the same thing cranks but wont fire or start 1 Answer

died on me on the highway got it towed home starting going at it, hooked two different scanners to it and not throwing any codes (ecm is working bc the map was reading correctly but also the rpm was...

i have a 92 gmc sierra 5 speed manual and when i let off gas out side and inside lights dim very low almost off and radio cuts off what is my problem 3 Answers

i have a 92 gmc sierra 5 speed manual and when i let off gas out side and inside lights dim very low almost off and radio cuts off what is my problem

truck is bogging and ticking when it gets hot on the highway. ideas? 5 Answers

When I drive about 30 km on the highway I start to hear a loud ticking sound (like a lifter) and when I press on the gas it boggs like I I can't get gas to it, then it cools down and stops

I have a 1994 gmc z71 with the 5.7 engine. When the truck gets to normal operating temp it loads up and stalls at low rpm's. The only way it will restart is holding the gas pedal to the floor. 2 Answers

I have replaced both injectors, fuel filter and complete tune up including the coil and the distributor pick up. Any help would be great.