Erratic cranking and backfire during start attempt
Have a GN 1984 where the wiring harness
was completely cut going to the module.
The wiring has been finally sorted out but
has a very erratic crank like over advanced
ignition timing. Cam sensor is synced
properly. Balancer appears to be OK not
cracked. New module also in place. Firing
order etc OK as well. Thanks for any help!
Search Buick Grand National Questions
Buick Grand National Experts