Quote:
Originally Posted by Rob124
Existing plugs have about 90,000 miles and 9 years on them.
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Quote:
Originally Posted by Rob124
Each plug tested the same-- .4 ohms, if my DVM is to be trusted.
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Something doesn't sound right. All symptoms point to a bad glow plug.......or more than one........
You've got plugs that have 90K on them and they
all test lower than a brand new factory plug (typically .6-.8 ohms).
Your test with an ammeter might show some different results than one would expect with those resistance readings. The initial inrush current will be about 30 amps per plug for a brief moment if you actually have .4 ohms. But, I'll wager that one, or more than one of them is nowhere near this value.