I've got a 99 Superduty. 7.3
My check engine light comes on and off constantly. The truck wants to idle way up on it's own, up and down. When I'm driving, it will "surge" like it's giving itself gas. Any suggestions on what to do before I take it to the dealer?
Thanks guys.
could be the TPS maybe? if it has a badspot when the pedal is resting maybe the resistance could jump all over the place?
I know my windshield wiper switch has a bad connection like that, it takes me a while to get the stalk to "connect" and make the wipers go the speed i want (or even turn off)
I unpluged my ICP and the service engine light soon light stays on but the truck doesn't sputter.
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