Stalling when idling and driving Please help! - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 02-14-2006, 02:18 PM   #1
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Default Stalling when idling and driving Please help!

I have an 89 se and I am had trouble with my car earlier in the winter with it shutting off on me when I was driving or when it was just sitting there idling. It then went away for about a month until I replaced the battery. That same night It started shutting off on me again while driving. The tack would go crazy and SES light came on. I cleaned the MAF sensor but it still is doing it. I didn't know if changing the battery might have anything to do with it. I thought it was cold weather related but I am not sure.

Any help would be great.
Thanks,
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Old 02-14-2006, 05:55 PM   #2
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Hopefully you have a stored SES code. You can check it yourself by following these instructions.

http://www.bonnevilleclub.com/forum/...e=article&k=57

Perhaps you could also check for a tight connection at the ICM?
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Old 02-15-2006, 06:12 PM   #3
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Default ICM

Yes do check the ICM connector. Remove and install a couple times and tighten up on the socket prongs.
Intermitten stall could be a bad connector, or sensor going out.
Let us know if you have any codes.
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Old 02-15-2006, 09:53 PM   #4
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I will try to get the codes the next time the SES comes on. Thanks for the link. I also sprayed some wd-40 on all th connections and I didn't have any trouble this morning. I am going to keep and eye on it. It just seems to be cold weather related. That'* what I don't understand. Would the cold weather effect connections?
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Old 02-15-2006, 10:58 PM   #5
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Quote:
Originally Posted by snow4frog
I will try to get the codes the next time the SES comes on. Thanks for the link. I also sprayed some wd-40 on all th connections and I didn't have any trouble this morning. I am going to keep and eye on it. It just seems to be cold weather related. That'* what I don't understand. Would the cold weather effect connections?
The connection itself shouldn't be bothered by temperature changes, as long as they are good and tight to begin with, but wiring and insulation will change length slightly with a change in temperature. If a conductor somewhere is stretched fairly tight at normal temperatures it "could" cause extra tension when the temperature drops significantly, maybe disturbing the connection? It is a long shot. I saw something like this many years ago where the car wouldn't even click the starter when the engine was hot but would start normally after cooling for some time. The main battery cable to the starter had a broken conductor inside the outer insulation. When hot the insulation would stretch and the connection would break, when it cooled the insulation would shrink to make a good enough connection to start the car. The suggestions to clean and "excersize" the connections at the ICM and crank sensor are a very good place to start. Some of the signals used are only five volts or so, so it doesn't take a huge problem with resistance in the circuit to cause a problem. Of course some of the modules and sensors may be temperature sensitive internally for the same reasons.
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Old 02-19-2006, 08:44 PM   #6
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Been experiencing this over the last few days, the car'* left us stranded on a couple occasions.

Car started - warming up and idling, it suddenly dies.
Replaced the crank sensor. No go.
Replaced Coil/ICM with a known good used unit. Go, but dead again in less than 12 hours.

I had a lot of studying to do today, but my dad was up where the car was left last night. Got the mechanic buddy who fixed it the first time around to make a house call on a Sunday, and all systems were checked, still no spark. Until the mech grabs a whole shitload of wiring (don't ask me which ones, 'going into the firewall' i was told), violently pulls/shakes at it, and crank, vroom.
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Old 02-22-2006, 10:07 PM   #7
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Yeah it stalled on me again the other night but the SES light didn't stay home and I was in the middle of no where. But I let it sit for about ten seconds and started it again and had no problems. Every morning I start it up to warm up and it shuts off. But if I start it again it won't shut off for me. I have a 1:20 min drive to work and I didn't have any problems. It just seems that if I start it and drive it right away it will shut off on me but if I let it stall once and let it sit for about 10 seconds it won't shut off on me again. I don't know I think my car is just like my wife. She doesn't like the cold but if you get her warmed up look out!
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Old 02-25-2006, 11:26 PM   #8
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Thoughourly clean the battery connections (take them apart, wire brush them and put back together. I had a similar problem on a 90 SSE. You'd think a bad ground would make it hard to start, but it can start fine, but have enough resistance to screw up the ECM ground path.

I won't bore you with the tale of what I replaced trying to fix that problem, but you can probably imagine.
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Old 02-26-2006, 12:48 PM   #9
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Thanks for the info! I will clean it today and see if I have that problem tomorrow.
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