What did you do to your Cherokee today?
Moderator of Jeeps
Join Date: Jul 2011
Location: Frederick, MD from Cleveland, OH
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Year: 1993 YJ Wrangler
Engine: 4.0 I6
Well how about this:
I found my MAT wires wrapped in duct tape with this splice underneath:
One of those wires goes into a duct tape-wrapped splice near the injectors:
Seems shoddy, but the splices look good and clean. Factory, or, if not, do you know why?
Question #2:
Jeep backfires when I plug in MAT, regardless of operating temperature. All other related sensors have been changed. Could the backfire be caused by something else and activated when the circuit is completed? I can't think of anything which would cause that, but I don't know.
I found my MAT wires wrapped in duct tape with this splice underneath:
One of those wires goes into a duct tape-wrapped splice near the injectors:
Seems shoddy, but the splices look good and clean. Factory, or, if not, do you know why?
Question #2:
Jeep backfires when I plug in MAT, regardless of operating temperature. All other related sensors have been changed. Could the backfire be caused by something else and activated when the circuit is completed? I can't think of anything which would cause that, but I don't know.
Last edited by NewKindOfClown; 04-18-2013 at 06:37 PM.
CF Veteran
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Location: Glendale,Az
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Year: 1990
Model: Cherokee
Engine: 4.0l 6Cyl
Well how about this:
I found my MAT wires wrapped in duct tape with this splice underneath:
One of those wires goes into a duct tape-wrapped splice near the injectors:
Seems shoddy, but the splices look good and clean. Factory, or, if not, do you know why?
Question #2:
Jeep backfires when I plug in MAT, regardless of operating temperature. All other related sensors have been changed. Could the backfire be caused by something else and activated when the circuit is completed? I can't think of anything which would cause that, but I don't know.
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Location: Kansas
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Year: 1994
Model: Cherokee
Engine: 190-hp, 4.0-liter I-6
Got enough money to order my 1 ton steering! Gonna lock the front as well as get that steering upgrade on. Gonna be sweet
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Location: upstate NY
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Year: 1998
Model: Cherokee
Engine: 4.0
tried to figure out if 1/8" thick I-beam would be heavy enough to build a rear bumper with a receiver for a small trailer with a 4wheeler on it.
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Location: Star Prairie,WI
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Year: 1997
Model: Cherokee
Engine: 4.0
Removed my hitch today so I could remove the bumper. Had to break or cut off all the hitch bolts. I did all this so I could put the nut strips inside the frame rails in preparation for the shackle relocation brackets to go on in the next week or so.
Since the hitch was off, I cleaned it and removed the big chunky rust. Found a great use for an air chisel! Makes a great chipping hammer! Sanded then painted the whole thing with Rustoleum Rusted metal Primer.
Will paint it black tomorrow.
Since the hitch was off, I cleaned it and removed the big chunky rust. Found a great use for an air chisel! Makes a great chipping hammer! Sanded then painted the whole thing with Rustoleum Rusted metal Primer.
Will paint it black tomorrow.
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Location: Prescott, Az
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Find your Intake Air Temp sensor. It's the sensor just to the rear of the throttle body, has 2 wires, and screws into the intake manifold.
Where it's connector plugs into the harness you will see that one of the wires on the harness side is brown with a white stripe. Follow the brown with white stripe wire back into the harness. You'll have to open up the split-loom plastic sheathing to follow it. It will come to a splice with 2 other brown with white wires with duct tape over them. They're from the TPS and the CTS. The 3 wires will be spliced to a single wire headed toward the C101 connector if you have an 87 or 88. If you have an 89 or 90, you do not have the C101 bulkhead connector.
Now go to the MAP sensor. Follow the brown with white wire into the harness from there. You will find a splice with 2 more brown with white wires with duct tape over them. At the splice you will find the 3 wires connected to a single brown with white wire going toward the C101, or just along the firewall towards the engine if you have an 89 or 90. Along with the MAP sensor that you traced, they are the ECU sensor ground port and the diagnostic connector on the passenger inner fender.
You now have 2 sets of 3 brown with white wires, one near the firewall and one near the engine.
Cut the splices out of each set of wires eliminating not only the crappy factory splices, but also the single wire between them. Bring both sets of 3 wires together. Solder the 2 sets of wires together and insulate them properly with tape or shrink tubing.
Zip-tie up your new sensor loom to allow for engine movement.
I prefer to cover it with some new split-loom or wrap it neatly with electrical tape when done.
Revised 03-09-12
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Year: 1994
Model: Cherokee
Engine: 4.0HO
Hood Lifts. I am happy with it, however it required some modification on my '94;
I have to space out the computer because was hitting it, I used 3/4" aluminum spacers and 3" 10mm screws:
https://i.imgur.com/UBAcx7a.jpg
I also had to modify the the air box a bit, I cut the first tab on the lower box off and I cut the first two on the upper box:
https://i.imgur.com/Oez8Lih.jpg
Done:
https://i.imgur.com/UIoJcDT.jpg
I have to space out the computer because was hitting it, I used 3/4" aluminum spacers and 3" 10mm screws:
https://i.imgur.com/UBAcx7a.jpg
I also had to modify the the air box a bit, I cut the first tab on the lower box off and I cut the first two on the upper box:
https://i.imgur.com/Oez8Lih.jpg
Done:
https://i.imgur.com/UIoJcDT.jpg
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Location: Forest Hill, Maryland
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Year: 1998
Model: Cherokee
Engine: 4.0L
well later today I'm going to fill it with a little bit of gas so I can take it to my buddies house and get ready to lift it!!!
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Location: Baltimore, MD
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Year: 1999
Model: Cherokee
Engine: 4.0 I6 HO
Finished lifting it 2" last night. I love it. Its perfect. Coil spacers, 1.5" shackles, and HD offroad relocation brackets.
Last edited by a_shirey; 04-19-2013 at 07:22 AM.