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First change the fuel filter. Check the cat convertor.

Is the temp gauge showing the engine running hot? Could be a water pump prob if so.

second the first answer probably a clog in your exhaust,if not my camaro did something similar it was mass airflow sensor,but if that was the case it would register with computer.

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โˆ™ 2015-07-17 17:39:10
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Q: Why would a 97 Wrangler be hard to start when hot and run extremely rough when under heavy throttle?
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