Cracking a spark plug

BRXLT · Feb 16, 2012

I have a 2000 Ranger 4.0 and my spark plug on cylinder 5 keeps cracking and of course the porcelain keeps falling into my cylinder when it happens. anybody know why this might happen?

F150hybred · Feb 16, 2012

Crappy fuel would be the first place to start. Inferior fuel will cause a detonation situation that will have many symptoms... one of them is a broken spark plug porcelain.

BRXLT · Feb 16, 2012

well I know my fuel is fresh normally get it at the shell gas station. It's only on cylinder 5 idk what it could be but I only have basic repair skills

LIMA BEAN · Feb 17, 2012

If its lean say due to an injector or signal that cyl. is going to get hot hot. Even if you dont have a CEL on have you scanned it for codes? What plugs are you using? all the cool crap sucks use motocraft.

Cracking a spark plug

BRXLT

10+ Year Member

F150hybred

15+ Year Member

BRXLT

10+ Year Member

LIMA BEAN

15+ Year Member

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