Join Date: Nov 2007
Location: Los Gatos CA
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As the glowplugs begin to fail they draw more current. This can be hard on the under valve cover harnesses and valve covers electrical connectors, which causes them to melt.
If you have some time, pull valve covers and inspect for melted electrical harness at the place the harnesses plug into the valve cover gaskets. You can also test glowplugs by removing them and hooking them up to the battery.
When the glowplugs are failing and using more current, it can cause low voltage for the engine control unit.
On our 1996, there were only three glow plugs still working. Last year I replaced them all and it starts on the first crank.
Last edited by Diesel Monkey; 02-24-2009 at 08:24 AM.