Jim Cathey wrote:
Does anyone know what the symptoms are for one bad glow plug out of five?

Harder starting.  A dash light that doesn't act right.

Do they go bad gradually or do they just wake up dead one morning?

They stroke out.  After all, they're a cousin to an incandescent
light bulb.  One day they're fine; the next, not.

Except when the resistance of a plug slowly increases. I've had that happen several times!

Marshall

--
          Marshall Booth (who doesn't respond to unsigned questions)
      "der Dieseling Doktor" [EMAIL PROTECTED]
'87 300TD 182Kmi, '85 190D 2.0 161Kmi, '87 190D 2.5 turbo 237kmi, '84 190D 2.2 229Kmi (retired)

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