RPM surge after startup

Fantom

New member
Joined
Apr 25, 2006
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61
This is the second time this has happened with my truck since I had the 36k service done. Don't know if there's any correlation between the two.

After warming the glow plugs as soon as the truck is started the engine "revs" twice really fast to about 2k. It's never done this in the 5 years I've owned it until about 2 weeks ago. Anyone else have this happen or know why it does it?

The truck is a 2001 F550 7.3/auto Mileage is about 38k
 
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