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Jeep-Short Wheelbase All discussion of short wheelbase Jeeps: CJ, TJ, YJ and JK

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post #1 of (permalink) Old 04-10-2002, 12:16 PM
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performance chip

has anyone used a performance chip in a tj 6 cylinder? was it worth it. what about k&n filter of throtle body spacers.
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post #2 of (permalink) Old 04-11-2002, 01:52 AM
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Re: performance chip

I put a Jet chip in my 2000TJ a couple of months after I bought it. I noticed no difference in power at all. It did cause rough idle, stalling, hard starts, and a 2-3 mpg decrease. I took it out and the engine runs fine now. I don't recommend it. I recently put on a performance exhaust...Huge power gain!!...spent less than the chip cost too.
post #3 of (permalink) Old 04-11-2002, 07:25 PM
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Re: performance chip

I think the chip only works at wide open throttle. Also you need a lower temp thermostat(165 maybe). It tricks the computer into warmup mode so it gives the engine more fuel.
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post #4 of (permalink) Old 04-11-2002, 10:08 PM
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Re: performance chip

JP mag put it on a dyno and LOST 1 ft/lb of torque and only gained 1 hp top end. Putting a colder thermostat in a fuel injected is not a good idea they need to be hotter than a carbed engine to produce power. Their are many cheaper hp mods than a chip. $260 for a 1 hp loss is not a good buy!
After installing a K&N filter and performance exhaust system I have a huge power gain. I tried the chip after the mods also and it made no difference other than the before mentioned problems I talked about in my last post.

Maybe my chip is defective, I don't know. Hopefully some others will post their experience with these.
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