Novak Conversions Jeep Wrangler YJ radiators

Problem with my 89 carbureted YJ

Sting67Ray

New Member
Joined
Apr 13, 2025
Messages
4
Location
Potsdam NY
Hi, I have a '89 YJ that I have had for 10 years that has a problem that I cant figure out, after driving for about 10 mins it starts surging and finally dies. I was thinking originally it is a carb problem, and replaced the carb with a new motorcraft. The problem is still there, next I replaced the fuel sending unit, still no love, lastly I went thru the ignition and put in new wires, plugs, coil, etc.....still no love, anyone have anything else to try? Jeep is a 4.2 Auto.

Thanks,
Tom M
 
Last edited:
Evening...fuel sending unit? Do you mean the fuel pump? Try changing that, then the fuel filter. If that's GTG consider your vacuum system.
 
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I feel like I read people had similar issues before with a bad ECM - capacitors failed internally. It is potted, which makes it a pain, but repairable with some patience. Or swap it out.
 
I believe it's referred to by AMC as the CEC system. Uses a couple of temp sensors, an O2 sensor, a basic computer and some metering rods in the carb to adjust fuel air mix. The late CJs, the carbureted YJs, and AMC Eagles with the 258 had it.
 
Novak Conversions Jeep Wrangler YJ radiators