i have had 3 mechanics look at my pickup about this problem and i have not got an answer for it yet. while my pickup is idling it will rev up like you just hit the pedal and let off can anyone tell me why that is
Will need more details to be able to help you more. Most likely a fuel issue possible electronic control issue. The rev up is probably from extra fuel being added. My grandpas 01 would surge at idle about 4 times per minute. Changed the fpr and voila it was gone. The surge was only 100 to 200 rpms at most. How much is the rev up? Is it only at idle or while driving?
My brothers 05 cumins does the same thing. He had an Edge Juice on it too. We thought it was that but itsnot. Hes running stock and it still does it. Only does it once about 30 seconds after he starts the truck.Acts like you just matt the throttle and let off. He has taken it out 2 different diesel shops and cant figure it out either.
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