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Truck does not start unless I wide open throttle.

Tiny
AO43100
  • MEMBER
  • 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 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 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
  • 3 POSTS
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
  • 3 POSTS
Correction, I have NO "Check engine light at all.
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Saturday, October 27th, 2012 AT 7:25 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
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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