RPM Surges - Ranger-Forums - The Ultimate Ford Ranger Resource


2.9L & 3.0L V6 Tech General discussion of 2.9L and 3.0L V6 Ford Ranger engines.

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Old 10-12-2013
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Join Date: Oct 2013
Location: San Clemente, CA
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RPM Surges

Have a 1990 2.9 4x4.. When going down the freeway the engine rpm will surge or go up 250 RPM.. It does this on its own with no input from me.. Any ideas why it would do this.

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