I had the classic signs of a bad glow plug, no pre-glow light, rough starts. I ohmed out the connector leading to the plugs, and saw 2.6 MΩ on #3. With the cross pipe off, and #3 disconnected, I measured the plug directly and see 2.6 MΩ to ground. So definitely a bad plug. Luckily, I can reach it without taking the intake manifold off.

My question is, what's the chances of the plug breaking after being in the car just one year? Are they weak from the get go, or does it take time? The top end was rebuilt and clean as a whistle when the new plugs were installed; I don't know if that makes a difference. Also, should I try to take it out cold, or with the engine warmed up?

Thanks.

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Jay Kickliter
Chasing 'trons (my thoughts and tutorials on electronics and stuff)


1995 E300D-Black on Black