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Old 06-22-2001, 08:20 AM
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Hey, guys--

I have an 1986 300SDL which runs beautifully with few exceptions. One of which is that the glow plugs seem to work intermittently. When I turn the key to the "on" position, the 5 second buzz always occurs, but the dash glow plug light comes on only occasionally. If the light does come on, the car will start easily. If the light doesn't, it's a pain in the neck to start and may take several tries, while blowing big black clouds of smoke. Any ideas how to ensure that the glow plugs always work?

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Old 06-22-2001, 08:47 PM
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Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
You may have a glow plug or plugs that are failing. I would have them checked. Also, there is a fuse in the glow relay that could have a small crack in it. If it does, replace it...

Good luck
Donnie Drummonds
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