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1999 Pontiac Grand Am

Tiny
CLFRISBIE
  • MEMBER
  • 1999 PONTIAC GRAND AM
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 1,500 MILES
Car quits when the weather is hot and I drice over 50 miles(aproxanuit) engine just shuts off, after it sits for 5- or 10 minuts it will start and run for 10 or 20 miles then shuts off again, this goes on until I let it set for a couple of hours
Tuesday, October 5th, 2010 AT 12:42 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Next time it refuses to start don't wait for it to make up its mind-do below immediately to determine if its fuel or spark problem

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine atleast 3/16 away from ground-have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs, coil's resistances, cap and rotor, distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it and keep testing
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Tuesday, October 5th, 2010 AT 12:47 PM

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