I have a C4500 work truck that will idle @ 700rpm at start up for aprox 5-7 seconds, then the rpm raises to 1000 and stay's there. If you put the throttle to the ground it will limit it self to 2200rpm max. At first I thought it might be the tow tune, so I loaded the stock tune back in, and it still does the same thing. I just changed the fuel filter (after prob. was present) because the truck got low on fuel about four days ago. I thought maybee it was plugged, No luck there. I have a log file saved, but it will not let me load it to the site. No codes show at all either. Any ideas? Truck is otherwise 100% stock
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