My 97 Jetta TDI with 130K just had the check engine light go on for glow plugs. Should I change all 4? If I only change bad ones how do I identify the bad one(s)? Will my check engine light rest itself or does it need a software reset?
Thanks
-Tim
I can't answer all your questions, but I would replace all four. You have a 7 year old car with 130K Why not just do it all. Of course that eliminates the question of how to tell which ones. I suspect a simple continuity test would ID the bad ones.
How to test glow plugs:
-- Roger
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