Question about 1992 Cadillac DeVille

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1992 cadillac deville looses power over 55 mph.

1992 cadillac deville runs fine under 55 mph. When run 55 or faster it starts loosing power and finally slows to 15 mph and won't recover unless the car is turned off and allowed to rest. It then runs ok for another 15 miles and starts the process all over again. Thx
Charles

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Have your Cat Converter checked, ASAP.

Posted on Apr 25, 2010

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