my car will crank but not start when it does start it will run for about an hour then shut off and will not start again until the engine cools down it wtartill s
5

Asked by Andy Mar 10, 2014 at 08:34 PM about the 1997 Pontiac Sunfire 2 Dr SE Coupe

Question type: Maintenance & Repair

3 Answers
10,685

Norm answered 10 years ago

Sounds like an EAVP (Evaporative Emissions) or oxygen sensor issue. There are a few components that can screw up proper fuel delivery when the engine gets warms. The Powertrain Control Module (PCM) controls the fuel mixture and adjusts it according to the temperature of the engine. It relies on the Oxygen sensor which sends a variable signal based on engine heat. If this goes bad, your engine can stall suddenly and not start until it cools down. You should check the OBD for a code, I'm guessing that it's either the oxygen sensor or excessive vapor from the EVAP cannister. BTW AutoZone or PepBoys will check the OBD code for you for free. Good luck!

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