Mechanics

PONTIAC GRAND AM SENSOR PROBLEM

1999 Pontiac Grand Am • 125,000 miles

My 1999 Pontiac grand am won't stay running when it warms up. It will start cold, but engine warms up it quits. It does idle a littl rough, and after a out 20 minutes it will start and run until it works up again. I have changed the throttle position sensor and the mass air flow sensor. What could be the next step.
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January 5, 2013.



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