MJ20

I’m one year younger than the combined age of my jeeps. Yep.

The weather will be around 100°f, 15% humidity. Nice for us but may be a little hot for you. The evenings will be really nice.

I looked over the emissions stuff and the engine has an egr and a canister. So the renix intake manifold was swapped. I did find a vacuum tee blocked with a screw from the intake to the booster when I checked the egr. Otherwise everything looks very good. You can see in the pic a screw in the vac line. I don’t know what goes there, I don’t have any of that stuff on my ’91 xj. I’m getting an ’89 fsm soon.

I have a 10lb source. It cost $10.81 for a fill at united fire in tucson. You must release all the co2 in the tank before having it refilled or there is an additional service charge of $10 for them to do it and they can’t refill until the tank goes back to ambient temps. They fill it while I wait in five minutes. There is a bottling company here that will refill them for $5 but too far for me to go to. Here’s a chart. http://www.powertank.com/charts.specs

From what I was told the engine swap was done by a pro. The po says they used the intake and exhaust manifolds and the fuel rail because of the elec connections. It has the renix flywheel and dist. I’ll have to look and see if it has an evap canister. I haven’t picked up the original engine yet. I’ll be able to tell if they used the old head because it will not be there. What I know is the comanche was purchased new in tucson but the original owners lived just outside of pima county so emissions were not required. The engine swap was done. Then last year the original owners gave the comanche to their grandson who is attending the u of a and lives in tucson. His registration required emissions and it failed. It has a vacuum leak and needs the disco module looked at. It doesn’t want to engage from lack of vacuum. I wasn’t that concerned about it because I am swapping axles anyway but I am going to find out what is wrong. I had a vacuum leak on my xj and it was the vac lines to the module. I’m planning on staying full width. I bought the 44hp after three months of searching and at the time was looking at the t&t full width kit. Then the 44 out of the ’87 xj became available so I bought it thinking I may narrow the 44hp. The axles became available before I could find an mj to buy. I am planning to do a rear soa and still thinking about the front. I bought a 14 bolt for the J20 so the dana 60 rear axle in it may become available now. I swapped a front dana 60hp out of a f350 in to the J20 when I did the soa a few years ago so I have all the 8-lug stuff left over from the low pinion 44 that was the stock front axle. I’m leaning towards the dana 60 because I just can’t seem to get excited about a semi floater rear axle, although I have been looking at a 9” axle that became available recently. I thought I would be spending $2k or $3k for an mj so now I have some extra cash to play around with. I searched for a year before this comanche showed up and for the price it is exactly what I wanted. All I have to do right now is get it to pass emissions and then I will register it. I bought it last week and got the title transferred, added insurance, and drove it home. You can tell with all my typing that I am excited. The grill is from a ’68 gladiator and new cj5 headlight buckets. I fabbed some angled mounts for external bolt access and some brackets to reposition the tranny cooler, condenser, and power steering cooler. There’s a lot of stuff behind that grill and it took some doing.

Thanks, I’ll research that cat. I’ve never heard of one that controls co2 before. The truck has a brand new cat in it but prolly just a standard replacement. I’m going to have to look at the engine again. I thought it had an egr from the renix swap. They do a visual on that here in pima county. I am just learning the renix stuff and don’t have much reference yet because my ’91 xj doesn’t have it. I am familiar with the egr system that’s in my J20 though. Any similarities? What lower cable are you referring too? I thought I got everything I needed as far as a mechanical speedo was concerned. I’ll do some research and get whatever I need because I need cruise control. I’m already glad I signed up here. I was going to wait until I had a more decent rig to show off and post it in the Comanche showoff sticky.

Hello everybody. My name is steve and I live in tucson. I bought an ’89 short bed with 200k on it for a new project rig and wanted to join this forum for some comanche talk, as well as post some pics and ask some questions and such. My new truck has the 4.0/15/231 combo and is a tucson truck with no rust. It’s in really good condition except for a few things. The only real problem I need to address is the door latch post on the driver’s side pillar was ripped apart and badly welded back in place. Now it’s cracking around the welds. I am going to have to cut it completely out and weld in a large patch for a new post. The main thing is the unibody is in great shape and it wasn’t wheeled so it’s a great platform for the build I want to do. The interior is decent, body has a few dents I don’t care about and it has air conditioning. I paid $800 for it and drove it home. The engine is a ’97 ho out of a tj with all the renix stuff put on it from the original. It has around 70K on the engine I was told. It runs pretty well but the po couldn’t get it to pass co2 last time at emissions. It has a vacuum leak at the disco that may be the problem. I’ll be going through everything soon and will get it to pass emissions. The original engine also came with truck. I have been reading up on the renix stuff and from what I see the engine swap was done correctly. I’m new to renix stuff but not to 4.0 ho mfi. I also have a ’91 xj cherokee (4.0/15/231) that I have owned for 14 years and an ’86 J20 full size jeep (360/727/208). I’m about done with ten years of building up the J20 and now the comanche is next with some future mods being planned for my cherokee. I sold my ’80 CJ5 last year to fund some of these new projects. Three jeeps are all I can afford anyway, lol. It’s going to be cool to have big and little jeep pickups. I already have some goodies bought for the comanche. I bought a full inst gauge cluster and cruise control stuff out of an ’89 xj for it. I bought a dana 44hp front axle out of a ’77 F150 for it. I bought a dana 44 rear axle out of an ’87 xj which may or may not go in the truck. Well here are some pics. Not much to look at and a stocker to boot. It’s going to be wheeled mostly on the rocks in the southwest when I get it built, hopefully in a couple years. My family of jeeps