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Truck starts and dies right away fuel pump does stay on.

Tiny
CRANEGUY
  • MEMBER
  • 2000 GMC SIERRA
  • 150,000 MILES
Batt went dead charged without disconcting batt. After charged cruise ind. And headlamp indicater lights stayed on with key off and engine would start and die right away. Changed ecm with a used one and lights went out but still dies right away I think it is in the injection portion could it in the security logic or something else. HELP ME PLEASE.
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Monday, October 10th, 2011 AT 8:12 PM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Could be a security system issue-Check the fuel pressure if its within specs if okay -computer probably has to relearn the idle speed-
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Monday, October 10th, 2011 AT 8:43 PM
Tiny
CRANEGUY
  • MEMBER
  • 3 POSTS
Fuel pressure is good my security light does not come on at all is there a way to bypass the security portion
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Monday, October 10th, 2011 AT 11:15 PM

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