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Old 10-30-2011, 01:15 AM   #1 (permalink)
RynMcDonald
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Join Date: Sep 2011
Posts: 68

Start up issue 1994 GMC Sierra 6.5 TD C2500

I will let the glow plugs heat up and let the light go off, but when I start it, it will idle slightly high for about 1 to 2 seconds(then check engine light comes on), idle low for a split second and then normal at which point the check engine light goes off. Can some one explain what's up here? Thank you.

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1994 C2500 6.5 TD. No mods, completely stock.
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