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#1 Black spark plugs
Posted: Sun Jul 23, 2023 9:55 pm
by Pgxxl
Felt like my baby was not firing on all cylinders. When I removed them ,all B 1-6 plugs. Side on which carbs are mounted were coke black. Any suggestions
#2 Re: Black spark plugs
Posted: Sun Jul 23, 2023 11:40 pm
by DWW
Was bank B running rich for any reason? check the state of bank A plugs.
#3 Re: Black spark plugs
Posted: Mon Jul 24, 2023 11:23 am
by Jack the lad
Worth checking the choke cables are not sticking in the "on" position. Also worth checking is the height of the main jet tubes in the centre of the carbs.
#4 Re: Black spark plugs
Posted: Mon Jul 24, 2023 2:08 pm
by Jack the lad
I've just re-read your question and now ask: Are you sure you have a V12? as both sides of the car should have carbs mounted not just the B side as stated in your opening statement.