96 GMC JIMMY HARD TO START WHEN COLD

  • Tiny
  • George Spracklen
  • 1996 GMC Jimmy
  • 175,000 miles

When Cold the car wont start. Have replaced fuel filter, did a tune up.

Monday, December 5th, 2011 AT 7:42 PM

1 Answer

  • Tiny
  • rasmataz
  • Member

Hot or Cold engine-Do below

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, Do you hear the fuel pump come On when you turn key on? If not check fuel pump fuse and fuel pump relay if okay-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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Monday, December 5th, 2011 AT 8:06 PM

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