Performance Chip
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Seasoned Member
Joined: Aug 2008
Posts: 400
Likes: 1
From: Minnesota
Year: 1999
Model: Cherokee
Engine: 4.0L
Performance Chip
Renix Super Guru
Joined: Mar 2008
Posts: 24,653
Likes: 19
From: In yourz postez fissin jurr spelinzs
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.
Seasoned Member
Joined: Aug 2008
Posts: 262
Likes: 1
From: PSL FL
Year: 1999
Model: Cherokee
Engine: 4.0
Renix Super Guru
Joined: Mar 2008
Posts: 24,653
Likes: 19
From: In yourz postez fissin jurr spelinzs
Year: 1990XJ/1989MJ
Model: Comanche
Engine: 4.0L Renix
Senior Member
Joined: Jul 2008
Posts: 662
Likes: 0
From: Orlando, FL
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.
CF Veteran
Joined: Apr 2008
Posts: 7,661
Likes: 15
From: Smiths Station, Al
Year: 87
Model: Wagoneer
Engine: 4.0 I6
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Junior Member
Joined: Aug 2008
Posts: 74
Likes: 0
From: Erie, PA
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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4WD4EVER
Modified XJ Cherokee Tech
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Jul 28, 2023 07:12 PM
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