1991 Holden Commodore Vn V6 Playing Engine Erratically Breaking Down Running

1991 HOLDEN COMMODORE
200,000 MILES
Avatar
P MCKENZIE
  • MEMBER
  • 1 POST
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.
Apr 10, 2012 at 10:30 AM
Advertisement
Avatar
MERLIN2021
  • ✓ASE Certified Mechanic
  • 17,250 POSTS
  • ASE Certified Mechanic
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!
Apr 10, 2012 at 3:49 PM
Avatar
MHPAUTOS
  • ✓ASE Certified Mechanic
  • 31,937 POSTS
  • ASE Certified Mechanic
often faulty coil packs and leads on these will cause this, but also check what merlin has suggested as well.
Apr 17, 2012 at 10:37 PM
Avatar
MERLIN2021
  • ✓ASE Certified Mechanic
  • 17,250 POSTS
  • ASE Certified Mechanic
Thanks Mark.
Apr 18, 2012 at 12:20 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.