I am a daily visitor to this site and credit most of my knowledge to these forums. So i have done many repairs following what others have said. But i have had an ongoing issue for about a year now. Anytime i take my jeep offroading and drop it into 4 high i can run it for about 10-15 min then when i let off the gas my idle drops from 800rpm in drive to 300rpms and continues to slowly decline until it stalls out. And everytime after that i can crank it over but then it dies. I have had the carter carb rebuilt twice and sprayed. The idle jets frequently and still no luck. It has new gas tank new sending unit, fuel pump, filter, and done the nutter bypass. Is there anything im missing or is it that carb
Also has new thermostat, flushed radiator, new plugs and wires, timing has been adjusted. Also in 2wd driving around town it runs fine. Ive noticed it only gives me problems when i run it in 4x4. Not sure if that helps just figured id explain as much as i can
I don't know what year your is but I had a 1987 that wss doing the same thing.... it just blew up.. the 1987 motor I just bought. has a carburetor upgrade non-electric... I was told that the electric one girls are junk. and you can't do much with them.
Where in Florida? Lake county here. The humidity down here will definitely toy with your Carb.
You said in 4x4 is when it acts a fool. Are you flexed or steaming in the water. Carbs are notoriously finicky about angles and steam.
If you have the girl leaning over in a hole or obstacle, the Carb will start loosing fuel.
Steamed...if you hit water and it steams off of the hot jeep. The Carb will suck in the steam. Steam doesn't burn like air.
How's your fuel pump and filter?
Oh gotcha ya that makes sense. It has brand new fuel pump and filter. The only thing in the fuel system i didnt replace was the lines and the carb. Ik the idle tubes were being drilled out on that model. But i wasnt sure if maybe there were vaccum lines that were for the 4x4 only or anything like that. Plus another problem ive been experiencing too is i have to pump the gas quite a few times to get it started cold
Quick update, cleaned out the tubes and man almighty what a difference. I think the next time ill have to clean them ill drill them out. The idle tubes are the copper looking tubes though right? Not the screws with the holes in them?