What did you do to your Cherokee today?
Moderator of Jeeps
Joined: Jul 2011
Posts: 21,029
Likes: 3
From: Frederick, MD from Cleveland, OH
Year: 1993 YJ Wrangler
Engine: 4.0 I6
Senior Member
Joined: Feb 2012
Posts: 632
Likes: 168
From: Colorado Springs
Year: 1989
Model: Cherokee
Engine: I6 4.0
Senior Member
Joined: May 2013
Posts: 541
Likes: 1
From: Vancouver
Year: 1998 and 1988
Model: Cherokee
Engine: 4.7
Took her out for a first drive after tuning it to burn at most economical air fuel ratio (15.4). Filled it up and will se Ho far this tank taks me. I noticed that under load the PCM still makes the mixture richer. I guess I won't have to re tune when I tow. If its to lean then, il set up a switch for tow / economy. More to follow.
CF Veteran
Joined: Oct 2011
Posts: 1,812
Likes: 0
From: South Mills, NC
Year: 1998
Model: Cherokee
Engine: Rebuilt 4.0L I6
Took her out for a first drive after tuning it to burn at most economical air fuel ratio (15.4). Filled it up and will se Ho far this tank taks me. I noticed that under load the PCM still makes the mixture richer. I guess I won't have to re tune when I tow. If its to lean then, il set up a switch for tow / economy. More to follow.
Senior Member
Joined: May 2013
Posts: 541
Likes: 1
From: Vancouver
Year: 1998 and 1988
Model: Cherokee
Engine: 4.7
CF Veteran

Joined: Jul 2012
Posts: 4,104
Likes: 2
From: San Antonio, TX
Year: 1996
Model: Cherokee
Engine: 4.0L
CF Veteran

Joined: Jul 2012
Posts: 4,104
Likes: 2
From: San Antonio, TX
Year: 1996
Model: Cherokee
Engine: 4.0L
☠ CF Sheriff ☠

Joined: Nov 2009
Posts: 15,197
Likes: 18
From: Aberdeen, MD
Year: 1995
Model: Cherokee
Engine: 4.0L HO I-6, 703 Injectors, Brown Dog Super Engine Mounts
It changed for me! Much less effort for speeding up. And thanks to low rpm torque I can shift earlier, and 5th gear makes sense now
. It was hardly pulling if I was under 45-50 mph uphill, but in 5th gear it now accelerates greatly, even below 40.
. It was hardly pulling if I was under 45-50 mph uphill, but in 5th gear it now accelerates greatly, even below 40.
CF Veteran
Joined: Oct 2011
Posts: 4,440
Likes: 3
From: Seal Beach, CA
Year: 1996
Model: Cherokee
Engine: 4.0 HO Straight Six



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