Coked spark plugs

[Sinque]

Hi,

I was experiencing misfires and so checked the plugs which turned out to be as black as night. I wire brushed them down and cleaned them and put them back in. It ran much better.

I took them back out to find they were as black as they were when I first cleaned them. Why are they coking up so fast after a 2 mile trip?

I got some new ones but don't want to put them in if they're just going to end up black after 5 minutes.

Cheers

[welshpug]

too much fuel going in, ecu temp sensor or lambda usually.

[tarzan]

try cleaning your TDC sensor they can get clogged with clutch dust. it may even be loose

[swampy]

They will clog up if the cars not up to temperature

Take it ons good run, like 40-50 miles including some motorway or dual carriageways

[Sinque]

http://www.saxperience.com/forum/showthread.php?t=418232

More problems!

[stevo67]

Also if you go past the service interval with oil changes then you can get a carbon build up.

[Sinque]

The oil got changed about 6 months ago along with the head gasket and then again a few days ago but the problems were occurring before then :/

[stevo67]

The oil got changed about 6 months ago along with the head gasket and then again a few days ago but the problems were occurring before then :/

In that case try a new lambda sensor.:drink:

[Sinque]

Brand new plugs ran in the car for a few minutes, a la black!

http://img.tapatalk.com/561dd8d5-c902-0662.jpg

Seriously over fuelling to the max. Exhaust fumes visible then disappear for a while like its changing mixtures or something