jamcomanche
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Comanche Fan (3/11)
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jamcomanche started following 87 2.5 Fuel Sending Unit Replacement and Pump Compatibility
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Looking for some help on compatibility with my 87 2.5. My fuel pump is on it's death bed and I had ordered a replacement US MOTOR WORKS USEP7006 which did not fit in the existing sending unit at all. The sending unit on my truck has an upper pump retainer bracket, and appears to use the EFPK-3210 pump. Not only was the US Motor Works pump inlet shorter and wider, but the unit body was too short to be secured with the retainer. I've started a return for that and in the mean time ordered a complete JPSU-6P4 sending unit from ebay because I couldnt find the JPSU-6P2.5, but I'm trying to actually figure out what the best direct replacement would be. I have been thinking that the person who owned the truck previously may have used a Cherokee sending unit, which is not listed as compatible with the MJ anywhere... Here is what I've found JPSU-6 Notes: Does not have upper pump retainer Listed Compatibility: 87 MJ 2.5 using pump EFPK-3210 87 MJ 4.0 using pump EFPK-3204 JPSU-6P2.5 Notes: Does not have upper pump retainer Listed Compatibility: 87 MJ 2.5 using pump EFPK-3210 JPSU-6P4.0 Notes: Does not have upper pump retainer Listed Compatibility: 87 MJ 4.0 using pump EFPK-3204 JCSU-8790 Notes: Has upper pump retainer Listed Compatibility: 87 XJ 2.5 using pump EFPK-3210 JCSU-8790P2.5 Notes: Has upper pump retainer Listed Compatibility: 87 XJ 2.5 using pump EFPK-3210 Does anybody out there know: 1. if there is a reason the XJ units are not listed as being compatible with the MJ? 2. if the JPSU-6P4.0 will fit and work in the 2.5? 3. the best place to purchase one of these Thanks guys!
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I originally had a 74 amp CS130 in my 87 2.5 and the bearing went out. Because I have some power fluctuations with lighting and an AMP installed, I decided to upgrate to a 105 amp 8137-3N from WAI Global. After I installed it and started up the engine, the voltage on my dash immediately went into the red at or above 18 volts. After a couple of seconds, it started cutting power repeatedly so I shut it off. I disconnected the output cable from the alternator and the connector and started her again to make sure it wasnt unrelated, and it read around 10-11v on my gauge. I started a return since I assume it's a bad voltage regulator in the alternator if it's pushing out that much voltage, but then I started thinking about what else could possibly be causing it. I ordered a pigtail replacement, which ended up being a 4-wire so I needed to figure out how to wire it up. Then I started looking at wiring threads and the pinout for the 8137-3N. My previous alternator only used the 2 middle terminals on the connector ( L and I/F pins ). When I look at threads about wiring up the CS130 with a 2-pin connection (this one for example), 99% of what I found said it should be using either S+I or S+L pins. Is there any reason I would need to change from the L+I connections to the S+I or S+L connection? Would that possibly cause the high voltage output? Or am I right in thinking it's just a bad regulator in the alt? Any help with this will also help me figure out the right way to wire in the new connector. Thanks!
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PM'd. Thank you!
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It probably depends on the condition of your wiring and whether or not somebody had previously done any splices or wire replacement. Here is a video for removing it on an 85 cherokee looks like you would be spending a good amount of time crunched up in the floorboard moving wires over to the new block one at a time.
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@JolietJEEP'84 Consider yourself PM'd - Thanks!
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Looking for the under-dash fuse block in decent shape. My current block has some melted terminals from the previous owner. I don't mind if there are broken or missing connectors because I am planning to replace all the connectors. If anybody has one or knows where I could get one, I would really appreciate it
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IMO Cherokee Carpet is the better buy, replacement Comanche carpet doesn't have much buffer at the back of the cab. I'd rather have too much than too little
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Help Identifying Air Compressor
jamcomanche replied to jamcomanche's topic in MJ Tech: Modification and Repairs
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My AC compressor stopped kicking on a week or so ago. I started troubleshooting by replacing the two relays under the hood, but it still won't kick on. I have service equipment to check the pressure, but my truck is missing service ports. I cannot find the high/low ports you see on retro-fits. Either my truck is still running an old R12 compressor somehow, or the guy I bought the truck from didn't install the system properly. I see one compression fitting on the back of the compressor that has threads on the inside of the opening. A second port has a cap screwed on. There are no other ports anywhere along so the lines. Can anybody tell me what I have here? I'm having trouble attaching photos so here's a link. https://i.imgur.com/TSywTOX.jpeg
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Clutch Master Cylinder
jamcomanche replied to Torq_Shep's topic in MJ Tech: Modification and Repairs
I have the stock 87. Havent converted anything, but I'm willing to upgrade if I can find the parts. -
Clutch Master Cylinder
jamcomanche replied to Torq_Shep's topic in MJ Tech: Modification and Repairs
@eaglescout526 sorry for the ping. When you have a minute would you be able to get me a part number for a genuine clutch master cylinder and tell me the best place to buy it? I put a new sachs unit on back in september that started leaking on me already.
