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Old 01-12-2013, 04:19 AM   #4
amc49
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Location: Fort Worth, TX
What I Drive: 00 wagon, 02 sedan both zetec atx

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If a radical change in power output and it seems to run fine down low but hits a solid wall and any more throttle just makes engine get louder with no increase in speed then look at cam timing belt, it may have just jumped a small amount. Mine did that, couldn't tell it until 35 mph where car stopped like with a rev limiter on it. One quick check may be yanking top belt cover and look at belt condition, mine had backside scraping and small cuts that indicated a pulley went south, locked and started dragging belt to derail it a couple teeth. Car idled perfect and seemed to rev normal when whacking the throttle.
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