TRUCK DOES NOT START UNLESS I WIDE OPEN THROTTLE...

  • Tiny
  • ao43100
  • 1992 GMC Suburban
  • 250,000 miles

Truck does not start unless I wide open throttle and has NO ALDL communication with the EDM

Saturday, October 27th, 2012 AT 6:46 PM

4 Answers

  • Tiny
  • JDL
  • Expert
  • 16,230 posts

So you can't communicate with computer? Check engine light doesn't work? Maybe a bad bulb or wiring circuit. I've seen some vehicles where the check engine lite wouldn't work, but, a scanner would work to show live engine data. That might give you a clue? Wide open throttle should place it in, clear flood mode. You may have a fuel leak?

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Saturday, October 27th, 2012 AT 6:55 PM
  • Tiny
  • ao43100
  • Member

Check engine light does work, it's ON. I tryed to communicate using Snap on scanner and jumping A & B termanals. No fuel leak extenally of at the TBI injectors.

Prior to the no start situation I had a lack of power (seemed like a restricted Cat) and no shift to high gear.

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Saturday, October 27th, 2012 AT 7:13 PM
  • Tiny
  • ao43100
  • Member

Correction, I have NO "Check engine light at all.

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Saturday, October 27th, 2012 AT 7:25 PM
  • Tiny
  • rasmataz
  • Member

Check and test the coolant temperature sensor and the throttle position sensor closed and WOT voltages-then let us know

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Sunday, October 28th, 2012 AT 12:51 AM

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