Yesterday my sierra cosworth started missing(running on 3). My first plan is to change the plugs as when I took them out the gap on them was about 2mm and I believe it should be around 0.7-0.8mm. What are the best plugs to go for? Any other advice?

Thanks

 

I'm using 071 plugs gapped at 0.7mm,try cleaning the crank sensor m8.

 

Ive taken the spark plugs out and they are champion c59c. One is a little oiled up.

 

What specs the engine mate?! c59s are ok in a standard cossie but stage 3 or anything like that and they tend 2 melt!!!!

Is the one thats oil'd the one that was missfireing?!

 

It is running standard ecu. Ye the one thats oiled up is the one thats misfiring. After swaping them round and taking the lead off it is defo that one!

 

It is running standard ecu. Ye the one thats oiled up is the one thats misfiring. After swaping them round and taking the lead off it is defo that one!