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1-14 of 15 Results
  1. YJ Technical Discussion
    Alright so to start.. Fresh engine swap. From what I can tell is a older engine due to the one wire starter vs the original having two. Get that rewired and now have a crank no start condition. Testing and a few parts later, tell me no fuel to the pump and no spark. Will not even sputter on...
  2. YJ Technical Discussion
    Hello all, I have done a great deal of work on my 88 4.2 thus far. While I am pretty happy with the progress, I am not sure if it would be able to handle long-distance drives due to age. I am thinking of a few options: 1) Rebuild current engine - already changed alternator, carb...
  3. YJ General Discussion
    I have a 258 4.2 6 cylinder I pulled out of my 1987 Jeep YJ. Looking at replacing with a crate motor and there are ALOT of different 258 motors to choose from, having issues determining which one I need. Block Castings are 107C07 (by the distributor) and EF3235444 (by Exhaust Manifold)...
  4. YJ Technical Discussion
    My 4.2L 6 cylinder engine runs great for being 30 years old. It starts up without too much fuss and purrs like a kitten. The only (pretty major) issue is that it smokes like a chimney when the engine is under load. This smoke comes up from the floorboards and the shifter boot and makes the jeep...
  5. YJ Technical Discussion
    '88 YJ (Nuttered) Starts Easily after Running but...not when "cold" even at 90 Deg F This is my first Carb'd Jeep, and fittingly my first post :beer me: Issue: So, I can start the 4.2L i6 without issue but only if it has been run in the past 24 hrs or so. It turns every time, however turns for...
  6. YJ Technical Discussion
    89 YJ 4.2l Weber carb. nutter bypass, ignition upgrade. i believe a 4.0 head. I am losings highway power. I was able to run 70 mpg no problem in 4th gear with 35" tires. i have 3.07 gears. recently i made a 40 mile trip and couldn't get over 70 down hill. I have done compression check, and had...
  7. YJ General Discussion
    I'm looking to swap my 92 I4 with an 88 4.2L I6. Trying to trouble shoot before I start and figure out how manageable this project is. The swap will include swapping the transmissions too. Will the 88 fit the 92 motor mounts? How hard is it to go from fuel injection to carb, or is there...
  8. YJ Technical Discussion
    I just bought a 1990 Wrangler 4.2L I6 (AMC 258) with 208k miles on it (with a supposedly rebuilt engine at some point, but how will I ever really know). She's a beauty and generally is a tight ride, but I seem to be lacking some acceleration and my fuel consumption seems high compared to the...
  9. YJ Technical Discussion
    I have a 1989 yj laredo with the 4.2. Recently I noticed that there is a small leak. Please help me identify what it is and how to fix it. Any help would be appreciated!!
  10. YJ Technical Discussion
    I have 4.2L 258 with a brand new carb (stock). It takes a while sometimes to start. Once it starts, it runs great. Battery is new and that isn't the problem. doesn't seem to be the starter. It really seems to be a fuel issue. Almost like each time i turn off the engine the fuel line...
  11. YJ Technical Discussion
    :facepalm:Hello everyone. I bought my first jeep. 1989 Wrangler 4.2L. Of course as soon as I get it home and correct all the vacume lines and stop the carb from dumping fuel, I find that the motor is shot. There is so much blow-by that the air cleaner is filled with oil. The sneak I bought it...
  12. YJ Technical Discussion
    Hey guys, I've got a '90 YJ and have installed the Mopar MPI on it (Love it BTW). I'm looking to install some aftermarket headers on it. Does anyone know if I should order headers for a 4.2L motor, or 4.0 motor? How about brand? I don't have a ton of cash to spend, but i plan on having this...
  13. YJ Technical Discussion
    I just cleaned my Carter carb and it was all fine but now when I turn her off she shakes and rumbles like she doesn't wanna be turned off. The shaking is only for about 1 second to 2 seconds max. And the idle is now at about 1200 so maybe adjust idle?
  14. YJ Technical Discussion
    Hello. I'm new to this forum and also a new driver :D Well i got myself a 1990 4.2 L YJ with 133000 miles on it and ive started to hear a clicking noise. It's constant and as i rev it gets faster and when its idled it becomes slower. It's really weird because if im stopped and its in neutral...
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