Vehicle not starting

Tiny
OELERICHP
  • MEMBER
  • 2000 GMC SONOMA
  • 6 CYL
  • AUTOMATIC
  • 184,000 MILES
00 GMC Sonoma 4.3 ltr. Vehicle cranks over but does not start. I changed the fuel filter and pump. What could it be?
Monday, January 31st, 2011 AT 10:21 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
**Cranks but no start condition:

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine at least 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 so, 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, distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it.
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Monday, March 14th, 2011 AT 6:24 AM

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