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Diesel Fuel Only - Factory Diesel Comanche


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If you have no power what kind of boost are you building? I'm sure the turbo is worn out by now. The older turbos are not even close to the quality as the newer ones are. My take even though I didn't read through your whole thread is if you don't have boost or enough air for that diesel it won't perform period. Maybe think about geting the turbo rebuilt or upgraded, it's not about how high of pressure you can create in the cylinder it's how much volume of air you can get. Possibly a more efficient turbo is in the cards? :dunno:

 

I wish I could help I love a problem like House is with patients. Too bad you are so far away. :fs2:

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Out in the world!

 

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Parked and ready to try to make the 10 mile journey to work tomorrow.

 

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See what happens. Still making that odd "Groan" that it did before I did the belt. I'll make mention of it to the shop when they do the timing. It would be nice to just have someone else run the ball for a little while. I took a video of it running when I got back from a half hour or so drive. I have a coolant leak at the pressure vent nipple on the radiator, but it's nice that it's not spewing oil like it was the first time I attempted driving it back in November.

 

EFVwx0G1YNw

 

Rob

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I can dig it. All of it. I'm totally diggin' the bizarrness of everything in your posts on this thing and now I really want one. Just so you know, I'd motor boat that. I'd motor boat the hell out of that.

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you replace all the bearings for the pulleys or atleast repack all the bearings with new grease?

may solve the groan :thumbsup:

 

and question,

should the manche idle at 2500?

most deisels idle around 7-800 rpm

 

keep up the great work!

comanche.gif

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I am there so much the people know me what Jeeps i drive and I even get discounts most of the time

 

Haha! So I'm not the only one? Rob, I commend your sense of adventure in getting this truck back in top running shape!

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you replace all the bearings for the pulleys or atleast repack all the bearings with new grease?

may solve the groan :thumbsup:

 

and question,

should the manche idle at 2500?

most deisels idle around 7-800 rpm

 

keep up the great work!

comanche.gif

his tach isnt reading correctly, he talks about it in the thread

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...u should put some smoke stacks on it lol!!!

 

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Rob

 

I can scarcely look past the abomination of an exhaust, the painted rims and the tractor trailer roof lights that are on the thing right now. This thing must be brought back to its purest form. I thank the heavens every morning that Rob was the one to obtain it.

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I can scarcely look past the abomination of an exhaust, the painted rims and the tractor trailer roof lights that are on the thing right now. This thing must be brought back to its purest form. I thank the heavens every morning that Rob was the one to obtain it.

 

Thanks brother. Initially, I hated the chrome. With a passion. Those rails and the box were leaving. The grille was leaving. Bumpers were gone. Wheels were gone. Red interior? I have 3 Black sets in the attic. The thing in it's entirety has grown on me. The chrome looks "Right" on it now. The grille looks amazing. The wheels complete the look. The bumpers tie it all in. The red interior is its personality. The truck definitely has a personality. I don't want to ruin that.

 

With all that said, the clearance lights still have to go. They look too out of place, and they made holes in the body.

 

Rob

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The chrome has gotta stay. This is an XLS package so I believe the chrome was standard?

 

I'd still prefer it to have the stock, unpainted rims if it were my rig. I feel like everybody and their brother paints paints their rims black. I can look past the rims if you promise to take the clearance lights off ASAP :D

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I love this truck, you have made excellent choices. Were it mine i would do the same as you, the look is perfect for a "happy Jeep". Don't fret over much about the power issues, make her run right & drive it... Slowly. :cheers:

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More done today... The clock is ticking over my head to have it ready to go for the long drive before Sunday...

 

Out and about last night picking up stuff for a party:

 

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Today I set out to get some fluids changed. Trans and Transfer.

 

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You will have to excuse my use of crap fluids, but just like the engine, I want to do a short term change/run, and then settle into a more quality, permanent fluid. I'll most likely run these a few more weeks, and pick up the AMSOIL stuff needed from Will.

 

First step, trans:

 

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Then transfer, but no drain pics.

 

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I also wanted to check the charge air system, so I pulled all the hoses and pulled the intercooler.

 

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I checked it for leaks, couldn't seem to find anything. All checked out. Before I put it in, I gave it a soak in some engine degreaser, and hosed it all down. First, it was sitting in the sun to dry out...

 

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That didn't go fast enough though, so I got creative in this heat. Hot air and a fan? Score!

 

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I also got to playing with the headliner. This seems weird to me, but it has been awhile since I've played with one... You guys think this has been recovered, or do you think it could be an extra layer of diesel sound deadening from the factory?

 

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I also reluctantly pulled off the rest of the side moldings. They weren't really on there all that well, and would have needed to be taken off and re glued anyway. Off they went.

 

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I just don't like the look of the truck without them. Those side moldings really break up all the white of the truck.

 

I did take it on a short test drive, and it does seem to shift/run a bit smoother with the new oil in the trans. I can't wait to get the trackbar bushing changed out (HOLY DEATH WOBBLE), and let it stretch it's legs. It still has no power, but hopefully (I say this a lot) things will be better after a visit to the diesel doc on Wednesday. On a good note, the power windows and locks seem to be coming around. Every time I get in for a ride, they move quicker and quicker. When I first started using them, I had to help them up and down. Now they are almost like real power windows. The locks are more of a gimmick. But, nice to have.

 

Rob

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Well fellas, not all that great of news. I dropped it off this morning, hoping for things to come down to some general tinkering. Not so.

 

He started by checking all the normal stuff to make sure the foundation was there, and that I didn't miss anything. He checked the timing, and found it to be a little retarded. He put it straight up and took it out, thought it was still weak, then tried it a little advanced. That really wasn't all that better, so he put it back to stock. Next he checked the fuel pressure, he said that was all good. He then checked the banjo bolts for the wrong orifice sizes or misplacement of orifices, found nothing. Next were the settings themselves.

 

Like I had mentioned, I didn't want to move the idle screw, as I didn't think it was right that I had to turn it up so much. He thought the same thing. He said it didn't seem like it had full fueling, and that at wide open, it felt as if the pump was only going halfway on fuel. One thing he did that I didn't have the balls to do was adjust the WOT stop. He moved it back a bit, and said that it reacted like it would with better function. But, at the same time, the same as the idle set, we shouldn't have to be so far off like that. We would basically be compensating for a failure, only masking the problem.

 

I guess the easiest way to explain what we are thinking is this:

 

Picture a clock. Say idle is at 12. Wide Open Throttle is at 6. What it seems like happened, is something in the pump came loose or is stuck... So now, it doesn't have the fuel from 12-3 o'clock, and 3 is where it starts to idle ok. The 6 position is still where the stop screw is still catching it, but basically we are starting later, which means that by the time we hit the 6 o'clock, we only have half of the throttle sweep completed. Rather than just shift the start to 3, and the end to 9, masking the problem, we need to get the pump rebuilt to figure out the root cause, and get us to where we need to be.

 

So, that's where I am with that. It needs the injection pump looked at in detail. This is out of my realm, as well as the diesel guy's realm, so he's going to send it out. He estimates that he could have it done in about a week, and that the rebuild might run about $500-600. He said that the bigger inline pumps normally run about $1000, but this being a smaller rotary style, he hopes it will be cheaper. Not to say some of the weirdness on it might not tack on some cost. He recommended sending the injectors along with the pump for testing, probably $100 for the four of them.

 

All that being said, this is how I look at it. It needs to be done. Might as well do it now rather than wait, and lose a summer of driving it. It will be rebuilt and warrantied, one less thing to be concerned with. The pump and all it's goofiness will be calibrated and good. He's going to take it out and put it in/time it, so the belt tension, timing, and all the other stuff should be set and perfect. I already have the miles on it to need a belt tension check, so this will be perfect to have someone more experienced set everything for the long haul. I already had him pencil me in for next week, plan to drop it off Thursday night.

 

Rob

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After some poking from our own Wade, I will be making the trek this weekend to the show. I was thinking of not taking the diesel after finding out that I'm going to need a pump, but Wade was beating me into submission.

 

The thing that really swayed me was when he said that "I think the diesel would be a unique item at an already unique show".

 

-He's right. This is our show. It's an AMC/Jeep/Renault/Rambler/Nash show at a place where that kind of stuff is held high. If there is a place to put it in a show, it's this one.

 

I am going to forgo some of the things I would have liked to get done, like the headliner, and the visors, and just spit shine the outside. Today I sat down with a load of adhesive remover and an old credit card to get all that old, grody, $#!& off of where the side moldings were... It was fine where the factory stuff had still held, but on the few pieces that came loose, some ignoramus decided to spray glue and tape them on. Took me about 3 hours of scraping, spraying, soaking, and more scraping to get most of it off.

 

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I took a picture of the good side. Haha. I washed it twice, as well as hit the top of the fenders and header with engine degreaser. They were black from all my dicking around putting everything right. I have a paint issue, which I am going to drag over to tech. You can find it there if you want to follow along.

 

Rob

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If you're sending out your injectors you might as well have your diesel tech check your compression to make sure all is well there. I would also consider having the turbo overhauled while the IP is out for repair if you can afford it... :wrench:

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so was it worth it to bring it? :brows:

 

Made it there and back without a hitch. Fawk yeah.

 

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Wade and I were literally the some of first vehicles you saw when you entered the show. When we got there, the guy just said park with the AMC's, so I cut it and parked next to the Javelin. If it weren't for the Wronglers, we'd have had the spot to ourselves.

 

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It had some interest, but it wasn't crazy. What I did find out was that the people who were interested, were talkers. They would comment on how different it was, and then it would turn into long conversations. I had 3-4 people pretty interested in it. Most just walked by. Wade's got some looks, especially from the Wrangler guy next to him. The Diesel took the trip in stride, with the only downside still being the lack of power. Hills would knock me off the speed train, and it took time to get it up to speed. Once I got up there, it was alright. Oil pressure was good, turbo boost was about 3-5 psi pretty consistently, and the temp was great. Overall, since last Tuesday, I've put about 130 miles on it. I can't wait to top off the tank and see what I am pulling for mileage.

 

 

I'll post a thread in the pub with some more pics and details of the show later.

Rob

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