The key is to find out what is causing the ECM fuse to always blow. With just the key on try and see if any codes are set in the ECM. If not, try a new ECM. If the fuse still blows, then disconnect all accessible electrical for everything, including radios, accessories, relay boxes,etc. except the ECM. If the fuse still blows, then probably something wrong with the wiring to the ECM. If it doesn't blow then start hooking up things one at a time until it blows again. Once it blows, that is your problem.
SOURCE: 92 Chevy Suburban Electrical Fuel System
I assume the fuel pump fuse is good?
The only time voltage will be sent to the fuel pump will be the first 2 to 3 seconds if the starter is not engaged. You will want to crank the engine over and check for voltage on the load side of the relay, circuit #30 at the relay.
Let me know after you check.
Regards,
SOURCE: 2001 chevy cavalier fuel problem?
try a little starting fluid and if it starts it might be the fuel pump or the fuel filter .. starting fluid will let you know if its a fuel problem or just what .. thanks Jerry
SOURCE: I have a 1996 Chevy Suburban it i just replaced
You need to bleed your lines and get all the air out.
SOURCE: ECMB fuse keeps blowing on a 88 S15 pickup. I have
Un plug the Computer to see if the fuse doesnt blow now. You may have a short in the PCM or the harness.
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