1998 GMC Safari Fuel System

Tiny
MIKEMIKE120
  • MEMBER
  • 1998 GMC SAFARI
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 85,000 MILES
Engine won't start. Voltage at Batt 12.6
Cranks fine. Won't start.

Question: Will code readers register faults for fuel pressure?
I connected ODC II with no stored codes.
I suspect fuel filter or pump. No pump whine when ignition energized. Thoughts/comment?

Oh yeah.I swapped the HVAC and fuel relays with no change/effect.
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Monday, December 29th, 2008 AT 3:41 PM

4 Replies

Tiny
RASMATAZ
  • MEMBER
Test the ECM B fuse and the fuel pump relay
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Monday, December 29th, 2008 AT 4:11 PM
Tiny
MIKEMIKE120
  • MEMBER
ECM B appears good and I swapped the relays with no change.
Is there a fuel pump test port. Or do I pull the cover to check fuel in the t. Body?

1. My instinct is open "carb" check fuel(vapor).
2. Test spark (plug)
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Monday, December 29th, 2008 AT 5:39 PM
Tiny
RASMATAZ
  • MEMBER
Do below and tell me what's missing

Get a starting fluid or ether and spray into the carb or the throttle body on an EFI. Did it start and die? If not 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, distributor pick-up coil, ignition control module, cam and crank sensors- Note: If it doesn't apply disregard it
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Monday, December 29th, 2008 AT 6:36 PM
Tiny
RASMATAZ
  • MEMBER
If its a Vortec fuel system-spider its located on the fuel line before it enters the upper plenum.
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Monday, January 5th, 2009 AT 1:53 PM

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