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Ford Ranger 4.0 high RPMS

KevinCro

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September 9, 2009
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I have a 2000 Ford Ranger 4.0 with 96k on it. I've had it for a little over a year and it's been one problem after another. Recently I was driving on the interstate and it started bucking at 60 mph. After I accelerated to 70 it stopped. It only did this for about 1/4 mile. I haven't been able to get it to do it since.

One thing that I have noticed, when I turn my O/D off the truck will be running at about 3200 RPMs at 70mph. This seems a little high for a 4.0 . Any ideas will be very appreciated.
 






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