oldred98 Posted August 25, 2007 Report Share Posted August 25, 2007 Hey guys, I have read a few of these posts that others have submitted that seem to address the problem I am having with my 92 3.1 It stumbles upon acceleration, and idles rough occasionally. I have changed the plugs, wires, fuel filter, air filter. The problem seems to be worse now than before the new parts! One moring I drove it to work with no problems at all, but the next day it was back to stumbling. It seems like a fuel related problem, such as a pump, but I see that other problems can mimic a fuel problem, so any ideas? Quote Link to comment Share on other sites More sharing options...
Crazy K Posted August 25, 2007 Report Share Posted August 25, 2007 remove egr and cleaned the port? o2 sensor? Quote Link to comment Share on other sites More sharing options...
ns87 Posted August 25, 2007 Report Share Posted August 25, 2007 Mine was the fuel pump. Twice Try the fuel filter first, its kinda easy. Quote Link to comment Share on other sites More sharing options...
joey b Posted August 26, 2007 Report Share Posted August 26, 2007 try some injector cleaner. I suggest the Lucas brand that can be bought at auto zone. Quote Link to comment Share on other sites More sharing options...
Andrew Posted August 26, 2007 Report Share Posted August 26, 2007 i agree with the above 3 posts, + clean the engine with Seafoam. Quote Link to comment Share on other sites More sharing options...
oldred98 Posted August 31, 2007 Author Report Share Posted August 31, 2007 I checked the fuel pressure, 42 psi static and 35 psi running, seeks ok. Maybe its a coil going bad, as it seems to act like that, but then again, many things can cause the same symptoms.................. Any thoughts??? Quote Link to comment Share on other sites More sharing options...
ns87 Posted August 31, 2007 Report Share Posted August 31, 2007 Coil would be more like a miss. I had one pack miss frequently for almost a year before it just died and I ran 4 cyl style Quote Link to comment Share on other sites More sharing options...
R Dubya Posted August 31, 2007 Report Share Posted August 31, 2007 definetely rule out coils and ICM. Quote Link to comment Share on other sites More sharing options...
joey b Posted September 3, 2007 Report Share Posted September 3, 2007 Why would you rule out a ICM? I had a car the the ICM would sporatically run on 3 cylinders for no reason whatsoever. It would then go back to running appropriately on 6. Quote Link to comment Share on other sites More sharing options...
ns87 Posted September 3, 2007 Report Share Posted September 3, 2007 I think he means "to deffinately rule out the ICM and Coils" before trying anything else Quote Link to comment Share on other sites More sharing options...
R Dubya Posted September 3, 2007 Report Share Posted September 3, 2007 was it raining when it stumbled? Quote Link to comment Share on other sites More sharing options...
WC-Frogger Posted September 3, 2007 Report Share Posted September 3, 2007 fuel pressure, 42 psi static and 35 psi running, and was the SES come on ? when issues appear ? can you power break the car to replicate the issue if not not a wire or coil ( some cheap wires out there ! ) have to ask ! Quote Link to comment Share on other sites More sharing options...
oldred98 Posted September 4, 2007 Author Report Share Posted September 4, 2007 No, not raining when it happens. I can only notice the stumbling when accelerating past half throttle. It may still be fuel related, as I have not checked out the ohms on the injs. yet. I would think that an inj. could cuase the problem, possibly shorting out and causing the rest of the injs to stop working, but I wont know for sure until I have chased down all the obvious possibilites. The only other thing I can think of is a plugged pickup screen on the fuel pump. Someone out there has to have had the same experience/s with their w-body....? Quote Link to comment Share on other sites More sharing options...
R Dubya Posted September 4, 2007 Report Share Posted September 4, 2007 Why would you rule out a ICM? I had a car the the ICM would sporatically run on 3 cylinders for no reason whatsoever. It would then go back to running appropriately on 6. so why wouldn't you rule it out then? Remove it and take it somewhere, i.e. Autozone and have them put a load on it. Sometimes it takes a couple of times to make it fail, heat is the main reason they fail. Sometimes at startup they are fine, as soon as they heat up, the thing will quit working properly. Also when you remove the coils its a good time to look for arch evidence on the plastic backing of the coil. Seen that many times as well. Quote Link to comment Share on other sites More sharing options...
synistershadows Posted September 5, 2007 Report Share Posted September 5, 2007 Why would you rule out a ICM? I had a car the the ICM would sporatically run on 3 cylinders for no reason whatsoever. It would then go back to running appropriately on 6. think of it as that new gas saving option Quote Link to comment Share on other sites More sharing options...
SLAMDIT Posted September 5, 2007 Report Share Posted September 5, 2007 Would a Throttle Position Sensor cause this? I am by no means an expert but I had a bad tps on my Taurus SHO and it was causing it to rev and run like butt... I just figured no one else had said it yet and that is what I was thinkin. -Sean Quote Link to comment Share on other sites More sharing options...
joey b Posted September 5, 2007 Report Share Posted September 5, 2007 Why would you rule out a ICM? I had a car the the ICM would sporatically run on 3 cylinders for no reason whatsoever. It would then go back to running appropriately on 6. so why wouldn't you rule it out then? Remove it and take it somewhere, i.e. Autozone and have them put a load on it. Sometimes it takes a couple of times to make it fail, heat is the main reason they fail. Sometimes at startup they are fine, as soon as they heat up, the thing will quit working properly. Also when you remove the coils its a good time to look for arch evidence on the plastic backing of the coil. Seen that many times as well. misinterpretation of what you were saying... eg. "You can rule the Royals out on going to the playoffs." sorry bout that Quote Link to comment Share on other sites More sharing options...
xtremerevolution Posted September 6, 2007 Report Share Posted September 6, 2007 tried cleaning the MAF yet? Quote Link to comment Share on other sites More sharing options...
joey b Posted September 6, 2007 Report Share Posted September 6, 2007 for crying out loud!!!! DO NOT DO ANYTHING UNTIL YOU CHECK THE ICM AND COILS!!!!!!! I'd say over 80% probability that the ICM is the problem Quote Link to comment Share on other sites More sharing options...
GP1138 Posted September 6, 2007 Report Share Posted September 6, 2007 for crying out loud!!!! DO NOT DO ANYTHING UNTIL YOU CHECK THE ICM AND COILS!!!!!!! I'd say over 80% probability that the ICM is the problem xmillion except there's no real way to do that unless you have a known good one. Check each spark plug wire for good spark, and if you're getting it, you have no way of knowing if it's intermittent or not. I'd get a set of coils and ICM from a junkyard and if that fixes your problem, that's great. If not, you have a spare set. Quote Link to comment Share on other sites More sharing options...
oldred98 Posted September 6, 2007 Author Report Share Posted September 6, 2007 No, have not cleaned the maf, did not know it had one what is the ICM, and where is it located? Spare coils I have, just havent tried them yet................ Quote Link to comment Share on other sites More sharing options...
GP1138 Posted September 6, 2007 Report Share Posted September 6, 2007 ICM and coilpacks are located under the front exhaust manifold... a terrible place for them, but there you have it. Quote Link to comment Share on other sites More sharing options...
oldred98 Posted September 12, 2007 Author Report Share Posted September 12, 2007 Hey all. I"m back, well, I had the ICM and coils checked, no defects. I also removed the plenum and ohmed all 6 injectors.....12.0 to 12.1 on all. Here is the new problem...........I started it up, and it runs worse than ever. I let it run for 10 minutes to "relearn " the computer, and almost caught it on fire! The exhaust from the cat back was red hot, and the carpeting was on the verge of self ignition!!! I am really at a loss at this point, and I just want my car back to normal. Does anybody know what I should do next? (let it burn???) Quote Link to comment Share on other sites More sharing options...
ns87 Posted September 12, 2007 Report Share Posted September 12, 2007 you might have to replace the cat Quote Link to comment Share on other sites More sharing options...
oldred98 Posted September 12, 2007 Author Report Share Posted September 12, 2007 Replace or delete the cat altogether. Going to try a timing light to get an idea if there are any dead cyls, and/ or timing. Maybe one of the "good" coils was really not so good...all they do is ohm the primary and secondary coils, so who knows? Quote Link to comment Share on other sites More sharing options...
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