al_brady

The head was warped and so was the block. I put a re manufactured 4.0 in it and replaced a lot of the original parts with new OEM parts. It works beautifully :) I learned A LOT doing this project.

I spent all day yesterday taking it apart and marking everything. I've never ever done this with any vehicle so naturally, I feel a lot more familiar with the way things work and a lot of things make sense now. Anyway, I'm taking it to get it fixed/milled/machined/what ever it's called today. I don't have a price estimate yet. But is there anything specific service I should ask for? I feel like I have a unique opportunity to make some awesome improvements/changes/upgrades while everything is already off. I'm just limited by my inexperience to know what to ask for or what is available on the the market.

I had mobile mechanic come out and look at it this morning. He said that everything I did was correct, but the problem was compression. The 1st cylinder was only reading 60psi (well into the red). He said I need to get the head redone. There's a local place called car quest that will do it for a few hundred. I'm gonna go ahead and do it just because it most likely has never been done. What are y'alls thoughts and experiences with this BTW? PS I'm in Navarre Florida. On the panhandle between Pensacola and Destin.

I just checked, the firing order is good. I'll try the old one here in a minute.

I did a lot of reading in here and in my Haynes book and went to work. So here's my update. 1) I disconnected all of the after market lights (KC's, Hella's), checked all fuses, and exposed wires, and cleaned up every ground I could find. 2) There was a loud humming in the fuel tank so I took the tank off, cleaned it out (there was a lot of $#!& in there), I let it completely dry in the sun for a few hours. I gave it a new fuel pump w/strainer and fuel filter. The humming was gone, there was a lot more giddy-up in the first three gears but I couldn't get past 50 mph. When I drove it home I lost power once I hit the dirt road and basically crawled along at 15mph on dirt and 30mph once I hit pavement again. I noticed the oil pressure dropped to around 20-25 and the exhaust was making a popping/thudding sound up near the manifold. 3) There was a leak in the oil pan gasket so I took it off, replaced the gasket and used that opportunity to replace the oil pump and strainer. It all went back together fine. 4) I replaced the sparkplugs, spark plug wires, distributor cap, rotor, and the coil along with the wire that goes to it. I didn't mess with the distributor base at all. The wires are ACCEL Hi-Temp super stock spiral core 8mm. 5) I replaced the crank shaft position sensor. Result? It won't budge. The battery sat on a trickle charger over night. The starter was diagnosed as being good. The starter fires up nice and strong, radio and head lights come on, the fans come on, the serpentine belt moves. I'm probably gonna get yelled at for this but I even left it in gear for a starting attempt and it'll roll forward an inch or two. We tried a push start, we tried starting fluid, there's just no combusition other than one instance of a backfire. We pulled the sparkplugs wires with the spark plugs one at a time and they are all firing but they're weak yellow sparks. These fixes seemed simple enough. Take pictures as you pull one thing off, put the new thing on in reverse order, yet somehow I made matters worse. Any ideas?

sounds good. I'll be sure to let everyone know what the deal was when I finally sort it out. thanks for the advice.

I have absolutely no idea what I'm doing. I bought the MJ so I could learn to work on cars, however I ended up totaling my other daily driver before I had a chance to get too crazy with it. I had a feeling it was a wiring issue because the guy I bought it from had $#!& going everywhere, but I know nothing about that sort of thing. I have the Haynes book but I'm dumb to the trouble shooting process and I feel like my speculating is running me in circles. Would pictures or videos help?

I have a 1988 Comanche Pioneer 4.0L 5-speed manual. It's the only vehicle I own so I'm in a rush to get it fixed. The guy I bought it from took a lot of short cuts that I've been fixing but this latest fix has got me a bit uncertain. I took it too a local NAPA, they hooked up an OBD-1 (?) and said "the computer is not getting any communication." They recommend getting a new computer. I'm looking for one online and I'm at a point of uncertainty. I understand that jeeps are interchangeable but I don't know what range of computers or varieties of computers are acceptable for my vehicle? Additional Info: The problem started with my KC lights. They weren't done right and one broke off of the top. I shunted the wires and the next morning when I turned them on while driving to work (I take dirt roads) the switch got really hot, melted, and broke. I disconnected the battery, removed the switch, taped the wire ends. Roughly a week later my starter goes out and I replaced it. Then a week after that, while driving down said dirt road, my radio goes out and a few miles later my engine starts humming and loses power. It jerks, pops, stutters, spits, and is sluggish in every gear. I almost stall out every time I go up hill and I can't get over 25mph on dirt roads. It's my daily driver so it's been a real pain in the @$$. I bought it in March and drove it for 6 months with no problems whatsoever but a lot of seemingly random things when to $#!& all at once and I'm wondering if there's an underlying problem that they're all connected to. There were 5 blown fuses that I replaced today and fixed a vacuum leak, it runs a little better but that's every last bit of info I can think of at the moment. I apologize if this is overkill but I'm really new to this game and need as much help as I can get, as fast as I can get it. My main dilemma is what engine computers I can use. All advice is appreciated. Thanks in advance.