MadPSI Posted June 14, 2006 Report Posted June 14, 2006 '91 Olds CSS... My injector fuse keeps blowing. I had this problem before and there was an injector that was out of spec (7-ohms). I replaced it and was on my way for a few months. Today the car decides to die in the middle of the road again. I immediately look at the fuse and it is blown again. I replace it with another couple fuses and they immediately pop as well. I rip off the intake and test all the injectors. They're all right around 12.5 so I'm currently at a loss. I tried putting in a fuse with all the injectors unplugged, but it still popped. What's the next item to look into when all the injectors check out? I did find that one of the injectors was leaking gas up through the plug. It had actually pushed the purple rubber wire retainer completely out of the socket and was spilling into the injector valley. I'll replace that regardless, but I can't figure out what's causing the fuse to blow... Any help is appreciated. Quote
Crazy K Posted June 15, 2006 Report Posted June 15, 2006 sounds like some frayed and shorting wires. but thats just my guess try testing the resistance in the wires? see if one seems to have low resistance? on the 3.1 they are divided into two groups of three. you might find a difference. the other possibility... put a large fuse in and start looking for fire! it might it be best to grab a complete engine harness off of an identical car? damn good luck! Quote
MadPSI Posted June 15, 2006 Author Report Posted June 15, 2006 I put the meter on the plug contacts, and I got some very low resistance (~3 Ohms). Sound right? I didn't check them all, but I will tomorrow. I put in a 30-amp fuse (3 x norm) and it instantly blew. Although fire looks nifty, I'd rather not build one in the engine compartment. Is there a step-by-step way to narrow it down, perhaps from the FSM or something else? I've never been a fan of replacing random parts only to find that they don't fix the problem... Quote
Crazy K Posted June 16, 2006 Report Posted June 16, 2006 damn. 3x and it still blew... you've gotta have a shorted wire somewhere.... I would assume it best to just replace the entire underhood harness. Quote
Supreme Cutlass Posted June 16, 2006 Report Posted June 16, 2006 damn. 3x and it still blew... you've gotta have a shorted wire somewhere.... I would assume it best to just replace the entire underhood harness. x2 Quote
White93z34 Posted June 16, 2006 Report Posted June 16, 2006 just start looking over wires, did you recently have the intakes off for any reason? heads? if so check to be sure that wires aren't pinched anywhere. might want to put your multi-meter on continutay (sp?) and see if any of the wires on the injector harnas are shorted together, that will make finding the short much easier. Quote
MadPSI Posted June 18, 2006 Author Report Posted June 18, 2006 ::UPDATE-FIXED:: I let the car sit for a couple of days because I had to work. I probed around with my meter today and found some very different results. None of the injector plug leads were shorted to each other anymore. The gas-bloated wires had shrunken down to almost-normal and everything else had dried out. I replaced the leaky injector with a new one, and replaced all the o-rings to be safe. I threw a 10A fuse back in the slot, reset the ECM, fired the car up, and drove around without incident. Apparently the gas that had leaked everywhere was the culprit. Quote
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.