Your truck is 5 years newer than my "Newest" Jeep--36 year newer than my other one!
I mess with CJs mostly, I answer in the CJ forums a lot, whenever they do come in (CJ are rugged and sturdy, few have problems!)
When you said "Choke", you were really saying, "I have a Carburetor!"
Over the years, everybody who has messed with 'em (older rigs) especially if they "WISHED" they were McGyver, has messed something up and it need to be put back normal---or "RIGGED" in a correct working fashion.
Unless you live near me--You must do all of the required testing and fixing. You got fixin' stuff? Know your way around your engine? Tune up tools. Give me some answers, before we get carried away.
I CAN DEFINITELY HELP YOU WITH THIS ENGINES PERFORMANCE. If you can do your end!
My CJ 5 is a 258, and very similar to your set-up, Jeep used some of Fords Systems---Ignition, starting.
The high idle is normally a solenoid or similar dealee, that pushes on your throttle arm (to make RPMs Increase) when the A/C is activated (maybe defrost also)
I have messed with this stuff in other peoples/ family's rigs, But most of the time, CJs just do not have A/C
On the cars from let say '74-'85, the auto engineers goal was to see how many vacuum lines he could cram into so many cubic feetThe more OLD--MESSED WITH VACUUM LINES--the bigger the possibility of leaks.
I live in a zone where, people do not even know what pollution is, 'round here, they do not check pollution stuff.
My carburetor vehicle is capable of running perfectly with 3 vacuum lines. Distributor Vacuum Advance---PCV---My Vacuum gauge on my dash.
I have no power brakes, my climate controls are cables, not vacuum, I have headers--No EGR. Yours probably has all of that stuff, . But thats only 5 lines (why are there 500 more?), Not counting the optional gauge.
So, in order to get it tuned up correctly, you must stop vacuum leaks, and make vacuum operated Whoop-T-Dos operate correctly. Or minimize the extra junk.
I have found that it is might near impossible to obtain Whoop-T-Dos for anything for 1990 on back. Case in point a '79 Jeep CJ Non-Linear Valve!
Please answer questions I asked (paragraph 5 especially)
Whachu wanna do? I help to the fullest extent.
We (both of us) can post pics too!
The Medic. As long as you need me!
Images (Click to enlarge)
Thursday, May 26th, 2011 AT 3:32 AM