95 SE engine shut off ocasionally - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 11-30-2007, 02:28 AM   #1
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Default 95 SE engine shut off ocasionally

hi guys, i just bought a 95 bonneville SE a week ago and it seems to shut off engine when in idling ( sometimes after 10-15 mins or 1/2 hr later ) and when driving, it would just died totally or kinda off and on again. i would restart it and it runs fine until it shuts off again. it has 'chk gages' light on every time it did dat. i have followed throught dis forum and done most chks : buss connectors very clean
changed new plugs
new alternator
clean batt connectors
new air filters
batt in good cond.
most stuff works fine except no alarm and steering wheel audio controls not working.

is there a post on diz problem? or could any kind soul give me some advice? :(
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Old 11-30-2007, 09:05 AM   #2
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In my experience that points to a Ignition control module... however it could be a crank sensor.
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Old 11-30-2007, 10:32 AM   #3
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Did you change the spark plug wires? I had a random shut off probelm as well. Changing the wires took care it. It'* a cheap fix and, if your wires are old, could be the cause of your issue.


Leif W.
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Old 11-30-2007, 10:47 AM   #4
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When the car runs does it run good?

when the car falls into a stall situation does the Speedo drop as well? If you were moving along the speedo should still read if you are moving.. It should not drop like a rock ( shouldn't drop like its been shut off either )...

The car restarts every time correct? as in right away?

Does cold or hot make a difference? First start in the morning.... Or after the car is warmed up?

I'd like you to do a test and start the car one day and let it idle and see if it just stalls out fo no reason.... If it does restart it and see if it repeats..

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Old 11-30-2007, 01:33 PM   #5
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I'd be curious to see what you find if you were to pull the insulator covers off the ends of both battery cables.

This is a very common problem, and is actually getting me on one of my cars occasionally. I need t replace both cables. There is no evidence from the outside. You have t pull them apart.
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Old 11-30-2007, 01:48 PM   #6
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Default plugs cable

Quote:
Originally Posted by LeifW
Did you change the spark plug wires? I had a random shut off probelm as well. Changing the wires took care it. It'* a cheap fix and, if your wires are old, could be the cause of your issue.


Leif W.
i have just replaced 1 cable when it broke off at plug head connector. yeah they r old and brittle, i 'll change them all i guess.thks!!
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Old 11-30-2007, 01:55 PM   #7
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I seriously doubt that'* the main contributor. Your car will actually run on 3 or 4 cylinders.

You are looking for a total dropout culprit. The battery cables are a good thing to check. They are very common in causing your symptoms, and are easier to check and cheaper to repair than a crank sensor which I would suggest as #2.
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Old 11-30-2007, 02:05 PM   #8
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Default runs good, maybe relay?

Quote:
Originally Posted by jr's3800
When the car runs does it run good?

when the car falls into a stall situation does the Speedo drop as well? If you were moving along the speedo should still read if you are moving.. It should not drop like a rock ( shouldn't drop like its been shut off either )...

The car restarts every time correct? as in right away?

Does cold or hot make a difference? First start in the morning.... Or after the car is warmed up?

I'd like you to do a test and start the car one day and let it idle and see if it just stalls out fo no reason.... If it does restart it and see if it repeats..
yes it runs good, yes, da speedo drop as well, yes, car restart every time as in right away, cold or hot make no diff, first start in morning no problem EXCEPT that it makes some clicking noise( b 4 i actually start it) from a relay (up front in bonnet) or something which makes da yellow chk engine light( left of panel) flashing in syn with da clicking for a sec or 2 then it stop. even when warmup, sometime it happens too. i did da idle test and yes at times it just shut off after 15min or more, its irregular. it restart immed. and yes it repeats after some time, and sometime it do dat wif dat clicking and flashing 'chk engine' b 4 it died or just for a split sec like kinda misfire. i suspect it was due to a relay problem but i dont have da electrical schematic diagram to pinpoint which relay. just my guess.. wat do u thk?? thks
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Old 11-30-2007, 02:07 PM   #9
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Default cleaned

Quote:
Originally Posted by willwren
I'd be curious to see what you find if you were to pull the insulator covers off the ends of both battery cables.

This is a very common problem, and is actually getting me on one of my cars occasionally. I need t replace both cables. There is no evidence from the outside. You have t pull them apart.
yup, i have removed both and sand them, applied dielectric spray and installed back.
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Old 11-30-2007, 02:09 PM   #10
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Quote:
Originally Posted by willwren
I seriously doubt that'* the main contributor. Your car will actually run on 3 or 4 cylinders.

You are looking for a total dropout culprit. The battery cables are a good thing to check. They are very common in causing your symptoms, and are easier to check and cheaper to repair than a crank sensor which I would suggest as #2.
i agree wif u, its a total dropout culprit.
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