I am wondering if anyone has experience in reading the burn pattern on spark plugs. I always thought that it should be a light brown or tan color when everything is ok.
What would very dark and smelling of gas indicate?
How about different burns in different cylinders?
My #1 and #5 plugs looked light brown, #2, #3, #4 were wet and almost black. They did not appear to be oily. #6,#7, #8 were similar but not as bad.
I have a 68 XR7 - 390 4bbl with Edelbrock Performer manifold, MSD Ignition, Demon carb (that is ANOTHER story), stock exhaust.
Ignition timing is set to 8 deg btc.
I'll get this cat sorted out yet!!!
Ken (68 Kat)
What would very dark and smelling of gas indicate?
How about different burns in different cylinders?
My #1 and #5 plugs looked light brown, #2, #3, #4 were wet and almost black. They did not appear to be oily. #6,#7, #8 were similar but not as bad.
I have a 68 XR7 - 390 4bbl with Edelbrock Performer manifold, MSD Ignition, Demon carb (that is ANOTHER story), stock exhaust.
Ignition timing is set to 8 deg btc.
I'll get this cat sorted out yet!!!
Ken (68 Kat)