dirty plugs

[southgate]

Been keeping an eye on my spark plugs and have noticed that cylinders 5+6 (2 nearest front screen) plugs are black compared to the others.

I know this must mean its running too rich on those cylinders, but why just those???

Carbon canister purge solenoid?
Weak spark?


Southgate.

[Big Al.]

Duplicate thread

Would you like this one moved over here?

http://www.pistonheads.com/gassing/topic.asp?h=0&a...

[kevin63]

Throttle bodies out of balance perhaps, or leads or coil pack, the list goes on, if it's running ok then i wouldn't be bothered how clean they are.

[southgate]

Big Al. said:

Duplicate thread

Would you like this one moved over here?

http://www.pistonheads.com/gassing/topic.asp?h=0&a...

No thanks Al, added thread here to see if there were more ideas..


Car can run a bit lumpy at higher revs. Plugs 5+6 noticeably more dirty than others.

[Peppe]

Check the condition of the HT leads, and also how they are routed compered to the cranksensor wire.

See: http://www.pistonheads.co.uk/gassing/topic.asp?h=0...