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erratic tach problem.

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Old 09-16-2007, 07:59 PM
SHHS52's Avatar
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Join Date: Sep 2007
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Default erratic tach problem.

[align=left]Driving along 65-70 mph, rpm's at 3000, the rpms will suddenly jump up to 3500+ or suddenly drop to 2600. I can feel the engine surge or lose power. This happens rapidly 5-6 times and then maybe not again for 50-75 miles. Car has 86K miles, totally dealer serviced at required intervals. The problem is intermitent and dealer cannot find cause. Need help.
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