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Unread 05-22-2013, 09:57 AM   #1
Jeepuzzled
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1989 MJ Comanche 
 
Join Date: May 2013
Location: Ventura, CA
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Performance chips for MJ

There are a number of companies offering performance chips to boost the performance of the ECU. They promise both horsepower and MPH improvements. However, independent reviews of these chips indicate that many of those companies are snake oil salesmen whose products are ineffective or actually degrade performance. Does anyone recommend a chip that actually delivers?

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Unread 05-22-2013, 04:19 PM   #2
cruiser54
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1990 MJ Comanche 
 
Join Date: Oct 2009
Location: Prescott, Arizona
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No such thing, especially for your 89. Snake oil it is.
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If you own a Renix Jeep, you'll want to check this out. >

An index to over 25 write-ups can be found in Post #1.

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http://www.cherokeeforum.com/g/album/1725214
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Unread 05-23-2013, 07:31 PM   #3
Jeepuzzled
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1989 MJ Comanche 
 
Join Date: May 2013
Location: Ventura, CA
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Originally Posted by cruiser54 View Post
No such thing, especially for your 89. Snake oil it is.
Those companies offer chips for every make, model and year of auto/truck. They just substitute any make and model into their description - as if they have a chip customized for every vehicle that was ever made. Pffft.
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Unread 05-23-2013, 07:39 PM   #4
cruiser54
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1990 MJ Comanche 
 
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Location: Prescott, Arizona
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I think it's just a resistor for the cTS to fool the eCU.
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Quote:
Originally Posted by chris87xj View Post
If you own a Renix Jeep, you'll want to check this out. >

An index to over 25 write-ups can be found in Post #1.

Cruiser's Mostly Renix Tips
My Jeep Technical Photos

http://www.cherokeeforum.com/g/album/1725214
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