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Driving down the road about 50 mph thinking "this old truck is running great", so I guess I brought this on myself. From 50 mph it started loosing power so I pulled over and tried to restart it, it cranks strong, has strong spark and even fires on a cylinder or two but will not run. My first...

I replaces the o-rings on all my injectors to try to smooth the idle and improve milage (hopefully. After I put it back together last night I test drove it and it ran much stronger. I statred it this morning and as I'm driving I notice a fuel smell, I checked it out and the quick disconnect on...

I have a mild rough idle and crappy milage and though I'd get the seal kit rather than the whole injector at 10 times the price. I removed the rail, pulled the injectors off of it and can manage replacing the o-rings; can anyone tell me what the hard plastic ring and the plastic hat shaped item...

More help! My 40k mile rebuilt 89 mj 4X4 4.0 has developed a knock that is only present at idle, sometimes changes when shifted into neutral or park, and sounds like its low, any ideas where should I start looking?

I serched without success and I'm hoping some of you know what's up with my trans. It could be that it's just worn out after 200k but it's a new trick after sitting for several months so I don't think so. Accellerating from a stop, the trans shifts unusually fast up through the gears and stays...

I need one of the small upper control arm rubicon express bushings, anyone want to sell there spare?

Had one a couple weeks ago and now I can't find it:(

I think my EGR solenoid is bad and my local parts stores say it's discontinued; can anybody tell me who, if anyone still carries them?

So I swapped an 89 engine from a manual trans rig that just smogged into an 87 longbed MJ auto with a warn out engine and it fails now on hydrocarbons and carbon monoxide. The truck runs well and just made the 750 mile round trip for the Rubicon run getting 15 to 18 mpg on the highway burried in...

Is there a better than stock torque converter available for the aw4 in my 87 MJ? I'm swaping 4wd parts over to a 2wd truck because it's in much better shape, has a rebuilt engine and air and it's a short bed instead of my current longbed. Thanks for any opinions.

I can't figure this one out so here goes. I have an 87 MJ with a 4.0 auto that has 180k on the OD. I just did the So Cal to Moab and back run (1500+Miles) and had no fuel issues but I had massive blowby of 1 qt per tank of gas through the air filter, no smoke from the tailpipe and milage of...

I'm replacing my oil pump today not rebuilding the engine and the manual said to just run the engine, nothing at all about priming. Is the pump self priming or have the writers of the FSM dropped the ball yet again?

I finally pulled the valve cover off my 180k 87 4.0 mj that I've owned for 6 months and I'm worried about how much sludge buildup it had. Between each set of valves there was up to 1 1/4" of dried brittle sludge, what a mess. I scraped it loose and blew it out of the head with the discharge of...

New problem for my 87 MJ. I had the - battery cable disconnected to do some work and when I re connected the cable the fuel pump continued to run, even with the key in my pocket and I could hear fuel circulating back to the tank? I had to leave the cable disconected to stop it??? Anyone know how...

Little help please. My 87 4.0 MJ was idling slow and rough so I cleaned the throttle body ( which was really nasty) and now it idles smoothly but very fast. Any suggestions as to what might cause this? Any help would be appreciated.

Is Anyone a running protofab plate winch bumper and if so what do you think of it?

It's too late for me to change my axle build but I'm wondering if I made a huge mistake in gearing. I read several articles and used the math provided to retain the stock ratio after converting to my desired tire size (35's) and the math came out to 4.43 and I went to 4.56's partially because I...

Anyone built a set of rock rails for an MJ? Pictures and info would be greatly appreciated.

Has anybody had any experience with S&S engine out of Spokan Washington. They claim to use all new moving parts for $1109 with a 7/70 warranty but I don't know them, any help is welcome.