My 1999 olds 88 runs rough after starting when the engine is warm but only last for a minute. It smooths out and runs ok?

Asked by Oct 09, 2017 at 09:06 PM

Question type: Maintenance & Repair

I have replaced the plugs, wires coils, mass air flow
sensor, upper intake manifold and gaskets.  
Numerous other sensors.local shops are making
no progress with diagnosis.  Just want to keep
replacing what has already been changed with no
improvement in performance.  Car starts fine in the
morning to go to work.  Usually starts after my ride
home if I have to stop by store etc. Where engine is
ran then shut off and restarted.  It spits sputters
and occasionally stalls,. But after letting it idle for a
little bit it smooths out and runs ok.  

1 Answer

83,285

Perhaps the idle control valve is bad.

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