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Is it my fuel pump

Tiny
TED UBU EVANS JR.
  • MEMBER
  • 2003 PONTIAC GRAND AM
  • 3.4L
  • V6
  • FWD
  • AUTOMATIC
  • 224,000 MILES
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?
Thursday, February 16th, 2017 AT 2:12 PM

1 Reply

Tiny
CARADIODOC
  • MECHANIC
  • 33,874 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.
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Thursday, February 16th, 2017 AT 3:42 PM

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