engine RPM lunging - Ford Powerstroke Diesel Forum
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post #1 of 1 Old 02-05-2012, 05:54 AM Thread Starter
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Angry engine RPM lunging

2002 7.3L 150,000 mi, When I'm driving at low speed ( less than 1800rpm ) the engine seems to rev up and down as if you were patting the accelerator. Even though my foot is steady on the accelerator the engine is lunging. I tow a 10,000 lb camper and it doesn't do it under heavy load only at lower rpms.
I have a RevTech stage 1 download in it.
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rpm lunging

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