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1999 GMC Suburban starting

Tiny
BIG DUTCHMEN
  • MEMBER
  • 1999 GMC SUBURBAN
  • V8
  • 4WD
  • AUTOMATIC
  • 110,000 MILES
Our surburban, sometimes doesn't start when you shut off for a short period of time, 15-30 minutes. If we let it set for 30 minutes and then it starts. It has been doing this for more that 3 years, but it happening more often now. Every time I call some one, by the time they get there it starts
Thanks
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Friday, October 9th, 2009 AT 5:17 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Next time it happens don't wait-do below to determine if its fuel or spark problem

Disconnect a sparkplug wire or 2 and ground it to the engine -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, ECM, Ignitor camshaft and crankshaft sensors- Note: If it doesn't apply disregard it
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Friday, October 9th, 2009 AT 6:06 PM

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