I changed my spark plugs the other day and I noticed something very weird. The leading plugs looked normal (used black color) but the trailing is where the problem is. Both of the trailing plugs were half black and the top of the plug looked new. It looks like it only fires on the one side. Where should i start? Has anyone experienced this?



Thanks

wopa20

 

just get new spark plugs....

 

ya but i dont want this to continue to the new plugs, This also may affect my performance.

 

check your timing



mike

 

thats what i thought but isnt the timing controlled by the cpu?

 

the advance is, but you have to set the initial timing manually