1997 Oldsmobile Delta 88 Missing when warm, stalls, have to

Tiny
TKIMMY
  • MEMBER
  • 1997 OLDSMOBILE DELTA 88
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 82,000 MILES
We have been having trouble with our car stalling when warm. Temperature gauge going up slightly and/or running roughly. Missing terrible, if you shift down and floor it, it will clear up somtimes. Once it died and we had to wait about 30 minutes then it fired back up. Local Chevy dealer put it on the computer and they said it was running lean We have replaced plugs, fuel fitler, used dry gas. It has been doing this for 6 months off and on. Could this be the fuel pump or the air flow meter? It does not make a difference if there is a lot of fuel or less fuel in the tank. Thanks for any help. I'm afraid I am going to be stranded but we can't get a diagnosis until it quits and I don't want that to happen.
Friday, March 5th, 2010 AT 9:53 PM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Hi tkimmy, Welcome to 2carpros and TY for the donation

Lets do this clean out the idle air control valve, EGR and PCV valves and test the throttle position sensor, manifold absolute pressure sensor and clean the mass airflow sensor to include a fuel pressure check. I know its a lot but this is where we start and get back with some testing results so I can get a basic idea where to go next.
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Monday, March 8th, 2010 AT 6:18 AM
Tiny
UNTMATT
  • MEMBER
  • 1 POST
Is it losing coolant and, if so, the coolant isn't leaking under the vehicle?

If so, you're 88 has probably got a defective upper intake manifold that needs to be replaced. It is made of plastic on the 3800 Series II engine.

The problem will only get worse until it water locks (when the coolant is pulled into the cylinders preventing the pistions from moving).

You can get many local autoparts stores to read the ECU error codes which should give some indication of the failing part as well. Unfortunately, the error codes don't help much with the defective upper intake manifold.
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Tuesday, March 16th, 2010 AT 2:40 PM

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