Performance Chip
09-05-2008, 06:44 PM
#2
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Year: 1990XJ/1989MJ
Model: Comanche
Engine: 4.0L Renix
Waste of money b/c the computer will try to compensate for the corrections the chip makes. I have heard that they decrease fuel mileage too.
09-05-2008, 06:47 PM
#3
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Year: 1999
Model: Cherokee
Engine: 4.0
09-05-2008, 06:52 PM
#4
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Year: 1990XJ/1989MJ
Model: Comanche
Engine: 4.0L Renix
09-05-2008, 07:33 PM
#5
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Year: 1992
Model: Cherokee
Engine: 4.0L
I put one of those chips I got from ebay and I get about 30 mpg and got about 40+ hp and it only cost me $20.00. Just Kidding! I know that was a load of crap just like those chips.
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09-05-2008, 08:23 PM
#8
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Year: 1999
Model: Cherokee
Engine: 4.0
Correct. You can only fool the computer for so long. Eventually it re-learns its fuel curve and renders that chip useless. It's just a matter of time.
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