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Unread 03-28-2013, 08:01 PM   #1
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Join Date: Mar 2013
Location: Salem, Oregon
Posts: 5
Comanche questions

I'm new to the forum so forgive me if I posted in the wrong section. I have a 89 comanche an my question is if the maintenance required light should illuminate when the key is switched on? I bought it with 110,000 and haven't seen it light up in switched mode. Just wondering because it could have easily had a bulb removed. Also anyone put a header on a 4.0 comanche? Any noticeable gains in any department? Fuel economy, power whatever. Thanks for any replies.

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Unread 03-28-2013, 11:02 PM   #2
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1990 MJ Comanche 
Join Date: Oct 2009
Location: Prescott, Arizona
Posts: 10,931
The maintenance required lightcame on after so many hours to remind you to replace th oxygen sensor. About 82,500 miles. Don' worry about it. Headers for your Renix are expensive and the gains are minmal.
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
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