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Old 07-26-1999, 10:43 PM
Benzmac Benzmac is offline
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Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
It is unlikely that the cat is at fault. Warm weather will make some cars slow because the ignition control unit will retard the timing. You can try replacing the temp sensor on the rear of the cyl head.

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