Oldsmobile Questions? Ask a Mechanic for Answers ASAP
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This can be caused by a vacuum leak like the intake gaskets leaking,throttle body gasket leaking.Most common is the upper intake gasket needing replaced as its common to blow out.
I have also seen issues with loose vacuum hoses or broken hoses needing replaced.
The fuel system should also be tested to see if there is an issue with over fuel or under fuel causing this needing corrected.The injector unit under the upper intake is a common component that can cause this fault here needing replaced.
These will need to be checked into/tested further to pinpoint and repair this fault here.
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