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Truck won't start

Tiny
CSOLLE00
  • MEMBER
  • 1989 GMC SIERRA
  • V8
  • 2WD
  • AUTOMATIC
  • 265,000 MILES
Ran fine Thursday and wouldnt start friday. Is getting fuel and fire, and the compression is fine. What could be wrong?
Sunday, February 13th, 2011 AT 12:39 AM

3 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Use a noid lite, check for injector pulse. It is possible to have fuel and spark, but, without rpm signal, no injector pulse.

Engine cranking, can you see injector spray pattern, TBI? I've seen injector spray patterns that looked good to me, but, when I used a gage and check fuel pressure, the pressure was half of what it should have been.
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Thursday, March 10th, 2011 AT 8:33 PM
Tiny
DOPA99
  • MEMBER
  • 5 POSTS
Check for a small magnetic sensor on the trans bell housing it reads the timeing
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Thursday, March 10th, 2011 AT 9:15 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
I don't believe that sensor applies to distributor ignition.
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Saturday, March 12th, 2011 AT 9:40 PM

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