Gxi5.7 Spark Plugs

[SteveB72]

During a recent spark plug change 1 of the 8 spark plugs showed that it was hardly burnt. The electrode was white and looked practically like it hardly been burnt after 275 hours on the engine? On an engine with of this size / displacement is it possible that this one cylinder is not putting out ? Without a loss of power / miss?

 

[alldodge]

It has been firing or it would look dark, my guess is it was running a bit lean on the plug being white. IMO plugs will last the life of the motor if maintained.

Which cylinder was it?

 

[Scott Danforth]

agree with AllDodge, it would be running lean

being a GXI, I would suspect a bad injector causing the lean condition.

 

[Bondo]

The electrode was white and looked practically like it hardly been burnt after 275 hours on the engine?

Ayuh,..... Welcome Aboard,.... Which cylinder,..?? It might be lean as mentioned above,..

Or,... a Clean plug could be gettin' steam cleaned from water intrusion,...

 

[Scott Danforth]

Ayuh,..... Welcome Aboard,.... Which cylinder,..?? It might be lean as mentioned above,..

Or,... a Clean plug could be gettin' steam cleaned from water intrusion,...

Good point