Cylinder misfire

Tiny
GEELO808
  • MEMBER
  • 1999 BUICK PARK AVENUE
  • 3.8L
  • V6
  • TURBO
  • 2WD
  • AUTOMATIC
  • 129,000 MILES
We have replaced the fuel injector and the spark plug as well as the wire for the cylinder and it is still misfiring. Checked injector pulse and we are getting no ground pulse at the injector. We have narrowed it down to the ECU but are in need of a schematic for the ECU. Are you able to provide this schematic? I hope you can help us. We greatly appreciate you taking the time to read this request.
Thursday, July 12th, 2018 AT 12:53 AM

3 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
Good evening.

Yes, I atached the diagram to this post for you.

If the wiring is good at the PCM, then it is a failed quad driver in the PCM.

Roy
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Thursday, July 12th, 2018 AT 7:20 PM
Tiny
GEELO808
  • MEMBER
  • 2 POSTS
Thank you very much Roy. I appreciate all your help. I will post the outcome of this repair soon.
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Friday, July 13th, 2018 AT 7:20 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
Sounds good. Feel free to ask any follow up questions.

Roy
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Friday, July 13th, 2018 AT 7:25 AM

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