Fouling #1 spark plug every few days

[Audiomaker]

I know I'm running rich in a few places, but I'm curious why it's always the #1 plug that fouls?


(02' turbo)

Thanks

 

[GIXERHP]

Have you swapped coil sticks around to see if the problem moves?

 

[Audiomaker]

Have you swapped coil sticks around to see if the problem moves?

No, but I will now! Figured I'd ask before beginning a diagnosis.

Thought it might be something special about the #1 cyl.

Sean

 

[dadofthree]

Good suggestion, gapped right for the turbo, right ?

 

[BusaWhipped]

Could be a flow problem with the injector. Try moving that to another cylinder if any of the above doesn't fix it.

 

[SKnight]

Is it oil or fuel fouling?

 

[Audiomaker]

Is it oil or fuel fouling?

The fouling is like black soot. All the cyl's have it, but all but the #1 keep firing.

Cleaning the plug causes #1 to fire normally again. Gap is currently .020

It has fouled now maybe 5 times. Each time was on startup after sitting for at least hours and usually overnight.



Sean

 

[POWERHOUSE]

Throw those plugs out. Put new ones in. Put the bike on a dyno!

 

[SKnight]

Throw those plugs out. Put new ones in. Put the bike on a dyno!

Agreed. You have a rich mixture, which if they're all sooty then it's too rich, and a weak plug then when it's cold and running richer during it's startup routine that's the one that will foul.

 

[Audiomaker]

Thanks guys!

Frank... LOL!

Sean