RPM Surges

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Oct 12, 2013

jpiper

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Joined: Oct 2013

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From: San Clemente, CA

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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