Join Date: Nov 2013
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99 F350 reving issue
I have a '99.5 F350 CCLB 4x4 with 160k miles. I've only had the truck about 6 months and it didn't have this problem when I got it but I don't remember exactly when the problem started happening. But anytime I turn the truck on and it's cold the check engine light will come on. After about 20-30 seconds the light will shut off and the RPM's will jump about 200 or so. The RPM's jumping and check engine light going off happen simultaneously. If I drive the truck for a while, turn it off and then turn it back on before the engine cools to much this doesn't happen, only when it's a cold start. Does anyone know what this could be?
1999 F350 4x4 Crew Cab Long bed. 240k miles and bone stock as of now. Looking to change that soon
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