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Has anyone ever used a power programmer in their Cherokee's? There are a couple from Hypertech.inc that look quite interesting and are compatible with my '98. They state that they will improve fuel economy at mid throttle and overall power at full throttle. There are some on the internet for around $400 I was wondering if anyone has been successful with them or not?!

Comments appreciated.
 

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Waste of money, i personally haven't had one, but know people who have, they have taken then out cause of their uselessness. You will get more out of a cold air intake.
 
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