White deposits on spark plug tips

[ganesh]

Hello chaps,

Was checking over my girlfriend's car (2001 1.6 Honda Civic), and noticed that the tips of all the spark plugs are quite white. From a bit of research this seems to suggest the tips have overheated. The car is completely standard, no running issues and has never overheated.

The back story:
The car has had the check engine light coming on intermittently for a little while now, seems to be related to driving over bumps or rough surfaces. So I'm guessing a loose or faulty wire somewhere?

Thanks all.

 

[ganesh]

Ordered a new set of plugs anyway, thanks for the help.

 

[ganesh]

No OBD2 reader, it's off to the garage today to have the codes read.

I'd usually fix it myself, but without a reader and it being bloody horrible outside i'll let them do it.