Question about Pontiac Grand Am
If the check engine light is flashing this indicates that a cylinder or cylinders are misfiring.If the rpms are increasing you may have a vacuum leak causing the misfire. Would check for any disconnected vacuum lines or a possible plenum/upper intake gasket leaking. To do this you can spray induction cleaner around the upper plenum to check and see if the gasket may be leaking.
Posted on Nov 14, 2010
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Posted on Jan 02, 2017
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