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TDDBAD

MEMBER
OLDSMOBILE

92 cutlass cierra, 215 000 K, 3.3. Car starts fine but if I fun it for about 30 min, shut it off and then start it again, it idles rough and stalls. If I lift the hood and let the engine cool for about 20 it starts fine. It doesn't stall when I'm driving just if I shut it off and start it again. The CTS is fine so it's not that.
I posted this a few days ago and no one has given me any suggestions, please help.

3 Replies

SERVICE WRITER

MECHANIC
9,123 POSTS

Take no offense to the lack of replies, There so many requests many go unanwsered for various reasons. I'll try to help but probably not the best guy for this. Things that may help lead you are:
Check the computer for codes.
Check the fuel pressure for proper spec WHEN the problem is happening. Using a spark tester (s), check for spark loss WHEN the problem is happening.

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Tuesday, July 31st, 2007 AT 8:28 AM

TDDBAD

MEMBER
23 POSTS

No codes, spark is good, fuel pressure is good. When engine gets hot and you try to start it, it idles rough and stalls. Has to be a sensor but which one and where is it. The CTS has been checked and it checks out good with a dvom.

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Tuesday, July 31st, 2007 AT 8:46 AM

SERVICE WRITER

MECHANIC
9,123 POSTS

I wonder if there is a carbon build up heavy enough to rob and absorb the fuel before it gets burned.
I would try a can of seafoam to clean out the carbon directly into the intake on into the cylinders. Would also clean out the throttle bore.

Obviously, diagnosing the problem is the best way to go after a problem. Kin Chan is a moderator that may be able to help.

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Tuesday, July 31st, 2007 AT 1:38 PM