88 Comanche werid ac problem
#1
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Year: 2000
Model: Cherokee
Engine: 4.0
88 Comanche werid ac problem
Been fighting this problem since I first got the truck running. 88 Jeep comanche 4.0 5speed 2wd, factory ac. Seems that when ever I rev the engine or its under high load my ac will change from max, normal, bi lev, vent, or heat directly to defrost. I've had quite a lot of problems with the climate controls in the manche. Still likes to melt the fuse while the ac is on no matter the fan speed. Could it be a problem with vacuum? I still have my vacuum reservoir and there's no noticeable vacuum leaks under the hood. It will switch settings without problems and heat works great. Any advice will be very helpful.
#2
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
The piping/hoses near the battery get trashed. You can't see them easily. You need to put more effort into finding your vacuum leak.
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Year: "87"
Model: Wagoneer
Engine: 4.0
Not sure if your camanche is same as wagoneer and cherokee's. But if so it should have a vacuum can/tank mounted under the bumper on right side. I used 2 vacuum cans from a 85 wagoneer and relocated too the passenger side fender well. It eliminated a good amout of vacuum lines (less lines less leaks) I removed the coolent tank and bracket. And mounted them with self tapping screws.
#4
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Year: 1990
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They ARE the same.
#5
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I'll inspect my vacuum lines today. I do have the vacuum ball still which I am going to relocate to under the coolant tank.
#6
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#7
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Well think I solved the problem, other day I had to bypass the vacuum ball to get air to not come out the defrost. Today I finally got to work by relocating the vac ball. Found it full of water. Drilled a hole and drained it. Sealed the hole up and then I found a hole in the vac line 3 inches from the firewall which is where it had been sucking water from when the comanche overheated earlier the day I had to bypass the vac ball. I have yet to test the fix cause I've been letting the flex seal cure on the pressure bottle.
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#8
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Year: 1990
Model: Cherokee (XJ)
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Well think I solved the problem, other day I had to bypass the vacuum ball to get air to not come out the defrost. Today I finally got to work by relocating the vac ball. Found it full of water. Drilled a hole and drained it. Sealed the hole up and then I found a hole in the vac line 3 inches from the firewall which is where it had been sucking water from when the comanche overheated earlier the day I had to bypass the vac ball. I have yet to test the fix cause I've been letting the flex seal cure on the pressure bottle.
#9
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Year: 2000
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The old ball is just fine. I used a screw to plug the hole and not the flex seal. My first time using the stuff. Thought I'd give it a try. So far seems pretty good stuff. Time will tell.
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