Is it my fuel pump

2003 PONTIAC GRAND AM
224,000 MILES • 3.4L • V6 • FWD • AUTOMATIC
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TED UBU EVANS JR.
  • MEMBER
  • 2 POSTS
Car will start up immediately perfect in the am everything is great, but as I drive it during the day and after I turn the car off I have to let it sit for an hour or so before it starts again. is it the module or pump or what do you think?
Feb 16, 2017 at 6:12 AM
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CARADIODOC
  • ✓Experienced Mechanic
  • 34,414 POSTS
Listen for the hum of the fuel pump for one second after turning on the ignition switch. If you hear that, the fuel pump is working.

A better suspect is the crankshaft position sensor or the camshaft position sensor. They often fail by becoming heat-sensitive, then they will work again after cooling down for up to an hour. While driving, natural air flow keeps them cool. When a hot engine is stopped, the heat migrates to the sensor and causes it to fail.
Feb 16, 2017 at 7:42 AM
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