when the ac is turned the engine runs rough

when the ac is turned the engine runs rough 1 Answer

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.

Engine running kind of rough 1 Answer

I replaced the intake gasket and ever since then it's been idling rough. The machine says the timing is zeroed out so not too sure what it is? Replaced the fuel filter and all plugs and wires and ...

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...

What is causing my GMC to advance the timing about 25° when I plug the wire under the dash together? 1 Answer

I disconnected the tan/black wire before setting the timing. I set the timing to 0°. Shut it down, connect the wire back, and when I check the timing, it advances about 20°. If I disconnect the wire...