I have a 1984 cj, 4 cylinder, 4 speed, basic little jeep, red.
i had the motor replaced, new long block at 135K, then replace carb with a Weber carb.
runs pretty good, no speed demon, but it only has about 60-80 hp (i think)
main issue, starts good, runs good, uses no oil
It was kinda of a pain getting the weber set up and running, but was because i am not that much of a mech. parts all fit fine.
got the carb from quadratrack or some such jeep place. firstname.lastname@example.org
email me and i can send you some pictures of the setup and tell you more about it.
unit has worked well for me.
I believe the 1984 model got AMC's version of the 4 cylinder, not the GM iron duke engine.
I think AMC stopped using the GM motor in the 1983 model year.
Iron duke was a much better motor, so i have been told, but I have the 1984 version so that is what i work with.
That was the first thing i was ask by a old mech when i told him i had bought a jeep with a 4 cylinder, he ask what year was it, i said 1984, he said well you got screwed, (he was never one to hold his true feelings back).
He said the 1984+ motors by AMC were crap++++.
but its worked all these years
I would argue with that mechanic. The AMC 150 is a very stout little engine. Mine had well over 220k on the odometer, never burnt oil, great compression. If I had not totaled the Jeep I am sure it would still be running just fine. They are not speed deamons...but with a proper axle ratio are tolerable.
I certainly would not put the money needed to rebuild an engine into your 4 cylinder, sorry but I can't hold my feelings back!
Now let me state that I own a 82 CJ8 with a 149k miles Iron Duke and it will kick the butt of my 86 CJ7 with only 50k miles. The 86 has a T5 OD tranny, like get serious. It is not that I'm opposed to the 4 bangers, I just wouldn't put 2-3 grand into one and that is what you are about to do. I rebuilt my 258, It was $1200 machine work, $425 new head, $150 new intake, $400 new carb, $150 new header and NO labor to assemble or install. I guarrenty you will be north of $2000 before it runs again. Find a complete running used 258 or go big and get a 4.0 and never look back. You'll be gald you did.
1985 CJ7 - total customization underway, Sublime green and Plum crazy purple, Ford 9", 258 w/ Holley 475
1985,93 CJ7,YJ - L98 TPI Vette motor, Atlas twin stick, Dana 60s front and rear, Arbs, 39.5 Swampers