White_Comanche

Read up on Cruiser's preferred method of testing the CPS with AC volts. After re-familiarizing that area of the 2.5 I was glad to see that harness is relatively easy to get to. I should be able to check these things out soon. Also, what is an easy method of checking fuel flow? Will I see or smell fuel spray when looking into the throttle body?

Hi again guys. I'd like some guidance on tackling a No-Start Issue that reared its ugly head again recently. My truck has had this issue since purchasing it from the previous owner in 2021. Thought that I had resolved the problem but it slowly resurfaced. 1986 2.5L MJ 5-Speed Manual Most notable symptoms that occurred BEFORE it began: • Driving: Sputtering during acceleration, and also when shifting upward • At Idle: sputtering when applying gas, and acted like it wanted to die when letting off • At idle: sometimes RPMs increased to, and sustained 2.5K - 3K for a few seconds (after working throttle for a while) Symptoms NOW: • NO Engine Starting (at all) Improvements that I've done up to this point (all within 2 years) Clean/Rebuilt Throttle Body - New Spark Plugs, Wires & Cap - New Vacuum Lines - Cleaned all or most Electrical Connectors - Reinforced & Cleaned All Grounds - New Oxygen Sensor - Transmission Professionally Rebuilt - Installed REM Clock My Evap Canister has been disconnected for several years - and all associated lines have been plugged. But please note that it never reeks of gas, and performance seems unaffected.

Oh... so now I understand why JolietJeep asked about a radio delete. Yes, this is the original door covering sans a speaker grill. Same thing on the drivers. The only speakers I have are what's inside the pillars behind the seat. I also don't have any behind those little speaker grills molded into the long lower dash piece that has the ashtray. Maybe because it's a 1986 that things are a bit odd.

Awesome, DM with the images. I’ll check back later today. No, my MJ is 1986 that does have the radio. I included the pic of the passenger door not only for eye candy, but also to relate to the window regulator.

I'm interested in tackling a future project. Does anyone have a Front Passenger Manual Window Regulator? I'd prefer it to be in great shape. Pictures of the assembly would be awesome as well.

Thanks for an alternate route. It's considerably less expensive, and smaller. I'll probably be on the lookout for one. Do you know the max lifting height on these? I've done some research, but most pages so far don't have any specs.

Guys, I just came across a very heavy duty scissor jack. Looks to be a quality product. In recent weeks I've been doing research on the best portable lifting solution for my MJ. I've considered all options (such as using a bottle jack + extensions). THIS might be the ticket. I like how an extension can be mounted for extra height. Below is one of the pictures they have in the gallery. Very reasonably priced too! https://gortech-usa.com/

Here's some very useful info for 2.5L guys. Throttle Body cleaning and ISA Adjustment procedure.

I got to see a Super Comanche at a car show called Thunder on the Plains in Kansas. My virgin white MJ was in the show as well. This truck was totally transformed, even with a custom bed topper. Wish I talked to him far longer than I did. If the owner of this rig is on Comanche Club give me a shout!

Sad to read of Cruiser's passing. He was a great help to me when I first got my 86 MJ a few years ago. I bought my Comanche with a known no-start issue that the past owner never bothered to fix. Cruiser gave me the drive to tackle this project head-on with zero experience working on vehicles. These days, my truck runs quite well thanks to the time, effort, and dedication that probably no mechanic would methodically do as I have.

Sure is a blast running around in a little truck that can haul ! Before being part of CC I've hauled off huge loads of random junk and rock destined for the landfill. Wish I documented those times because of how full it was loaded. But most recently, mine has been a real help on a summer front yard project.

https://www.nextechclassifieds.com/listings/2134189/ I'm familiar with this regional marketplace called Nextech Classifieds. Their listings don't last for long unless sellers keep posting their ads. Below was copied from the listing if it expires. More pictures are in the listing. Description Quote: Jeep commanche 600$ Straight/inline six cylinder Repainted at one time , needs some tlc . Engine start and runs , no smoke . Either the clutch or throw out bearing is bad . Need to get rid the jeep, don't have time to fix it . Any question message me on here or text 785 643 2 zero 1 2 I will type up a bill of sale , no title

Thanks a lot for the offer. I appreciate the help from you guys. Looking forward to when your PS bracket upgrade tutorial is finished!

I'm an 86 2.5L guy! I'd like to see a write-up on this bracket upgrade when you can SoCalManche. Was not aware of this, thanks Eagle. It took quite awhile to figure out how to change and adjust a new belt for a future project. Seemingly every manual out there glosses over 1986 trucks in regards to replacing drive belts.

Great write-up Eagle. Thanks for explaining things in granular detail when it was needed. This step-by-step will come in handy for anyone trying to figure this out. Wearing hearing protection during this procedure is really smart. I would include eye protection as well.

I think this would be awesome, and would pretty much eliminate any confusion on the whole process. Well over a year ago we exchanged a few emails regarding you rebuilding my ISA. Never did follow through because I eventually found out that my motor was quite new around the same time I did extensive work in and around my throttle body. The few times my ISA got stuck it was during cold winter starts from it not being driven for a long while. I read pretty much all literature in various FSMs on the whole procedure. When parsing out the steps from their word usage, it really gets confusing. A Comanche Club post using modern language and photos to fall back on will be a great help!

Took my MJ to its first car show this past weekend. The show brought in 80 vehicles in total. That custom cooler kart in the foreground got the 'show favorite' award.

Hey Eagle, do I search for ECUs like this? I've been seeing a little more than anticipated. Just curious... why am I not seeing any real continuity between the numbers on these labels vs the others that look in this style? Or are these a looping range of part numbers?

I'm inspired to get a backup ECU ever since @Pete posted that recent PSA about this critical piece. 'Cause no working brain box equals no vroom-vroom. My ECU is original, and judging by how it looks it could last my lifetime, but ya never know. Below are pictures of it, and a closeup of the label. I'd like to know: • What year(s) of MJ & XJ ECUs work in my 1986 2.5L Manual Transmission? • What Part Number(s) should I be looking out for? • Will computers from donors that have automatic transmissions work as well? Also, are any of the 2.5L compatible years better than others? I've read that 4.0s can get a small performance bump when installing the right one. Thought I'd ask to see if there's been any new insight discovered. Appreciate all the help guys. I see a lot of these on eBay, but very few that look exactly like my ECU.

Thanks for posting what you have available on eBay. Eaglescout got in touch earlier and is sending me a blue buzzer. It's been a busy week and I see this thread is quite busy. I have intention of reading everything in detail when the day starts to close. Thanks guys for all the help!

Sweet, will pm tomorrow. Thanks eagle.

After doing some research on CC I believe I should be after a Blue Chime Module. I'm getting tired of forgetting that my headlights are on. This image is not from me, I borrowed it from our forums. The Chime Module in my 86 has never worked. It was a black one. I pulled it today and checked for voltage at pin 1... nothing. Unless my procedure for checking voltage was wrong... The fuses associated with it are all ok. The female chime connector looks clean too. Guess I'll try a different module if I can find one.

Pete, I’ll send you an email sometime soon. I’d like to see if there are any straight-cut vinyl window stickers available.

Include some shots you might take. More 2.5L TB project images will surely help others out.