3800 engine stalls out as engine reaches operating temp - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 05-12-2017, 03:11 AM   #11
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Originally Posted by pjmia96 View Post
This is the plug I was talking about. just give it a good shake with your hand once the engine reaches operating temp. See if the car acts up when you shake it.
He has a series 2 engine NOT a series 1 like you have.
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Old 05-12-2017, 03:16 AM   #12
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Need a little help diagnosing this issue. Have a 97 old 88 with 3800 engine that starts and idles fine when cold but as it reaches operating temp it seems to be choking out. Has a new MAF sensor but if I unplug it then it will idle at operating temp just a little rough. I checked TPS and MAP sensors according to guides I found and they checked out fine. It does idle a little high about 1k rpm'*. Could the oxygen sensors be causing this?
If so is there a way to check them?
Take it to Auto Zone and have them scan for codes. I also own a 1997 Olds 88 and when the RPM gauge on the dash says 1000 RPM its actually about 824 according to my scanner.
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Old 05-18-2017, 11:17 AM   #13
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Looks like vac connections need replacement, some are cracked. The fuel pressure regulator vac was dry when I pulled it off. I'll get it checked with a better code reader to see if there are stored codes I can't access with mine and get back to all with the results. Thanks everybody for the assist.
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