My 1991 Holden Commodore vn V6 is playing up

Tiny
P MCKENZIE
  • MEMBER
  • 1991 HOLDEN COMMODORE
  • 200,000 MILES
My 1991 Holden Commodore vn v6 is playing up. Engine erratically breaking down/running rough/ clouds of unburnt black exhaust when it does. Not all the time. Suspect ignition problem. Coil bank. Sensor. Wiring. Has had new computer a few yrs ago.
Tuesday, April 10th, 2012 AT 10:30 AM

3 Replies

Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Running too rich, check. Vacuum line at feul pressure regulator if any gas is present, replace it, also O 2 sensors are beyond replacement age!
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Tuesday, April 10th, 2012 AT 3:49 PM
Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
Often faulty coil packs and leads on these will cause this, but also check what merlin has suggested as well.
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Tuesday, April 17th, 2012 AT 10:37 PM
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Thanks Mark.
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Wednesday, April 18th, 2012 AT 12:20 AM

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