Low voltage when first starting up

Low voltage when first starting up

11-23-2008, 06:35 AM

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Yooper67

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Join Date: Nov 2006 Location: Bossier City, LA Posts: 1,541 Photo Gallery

Low voltage when first starting up

I just noticed a new thing the truck is doing, and it only does it for the first couple minutes after it's started up after sitting more than 12 hours. The headlights will dim when I give it some gas and the voltmeter will drop to about 10 or so volts for just a second until the engine returns to idle. This only happens when the engine is dead cold and I didn't give it a minute or two to warm up. After the truck has been running for about 3 minutes the problem goes away. Never happens with a warm engine that's been sitting for a couple hours...just dead cold.

Is this the grid heater warming the intake air on a dead cold engine? Should I let the truck run for a minute before driving? Just first time diesel owner operator error...or an indication that this could be an electrical problem and requiring a trip to the dealer?

No CELs or anything else out of the ordinary...

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