1993 Chevrolet Silverado Repair Question
Hi, I have a 93 silverado truck with a 5.7 and was doing some trouble shooting. I unplugged my fuel pump relay while the truck was running and it died. The manual said to replace the oil pressure switch, witch I did. The only problem now is when I turn th
Asked by jasonpyzoAnswer
on some of those trucks they had issues with a engine ground. for some reason it used the distributor base as the ground.next time it acts up take a piece of insulated wire and make a ground from the engine to the chassie have someone to turn the key on and you listen to see if the fuel pump turns on. also have you had a engine scanner connected to it? does the scanner and the pcm communicate? if it doesnt you may have a computer iussue the fuel pump driver may be malfuntioning in the pcm. also you may want to get a repaire manual and check all your computer grounds if one is loosing its connection that could be the issue. i hope this helps with your problem.
there should be a ground cable form engine to body at back of right cylinder head as well as one from engine to frame. Atruck tis old may have a bad ground cable from the battery especially if you see corrosion at he terminal end on the battery.
