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Cold Running Problem 1983 CJ-7 258

Problem starting and keeping running until engine warm for years now. Colder weather, greater the problem. Once engine warm then runs great. Used for offroad only 1983, CJ-7, 258 cid, Carter 2 barrel 8338 BBD carb, points distributer has replace electronic ign. by previous owner. All computer stuff disabled/removed. Manual choke and throttle installed. Cleaned and rebuilt carb w/new kit. Carb servo unplugged and servo needles fixed in seated position toward center of carb. Had hope that this would have corrected the cold running/stalling problem, however, still unable to drive while cold and simply need to not drive and keep starting after stalling until engine is warm. What to try next?? Thanks for any help. Stew

Reply to
Art Stewart
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Reply to
Jeepster

Is your electric manifold heater working, how about the heat stove and flapper in the air intake? As I understand it without these the cold air/fuel mixture does not stay atomized very well and so doesn't burn very well either. When the engine is warm the intake manifold is warm from the warm coolant moving through it and this keeps the mixture well atomized. There is a website that talks about all of this but I don't remember it. Someone her likely knows it.

Reply to
habbi

Could be they removed too much 'computer stuff'?

There is a heater just under the carb that turns on until the intake manifold has hot water running through it. It gets power from the oil pressure switch that feeds a relay trigger via a thermostat on the back side of the intake manifold.

Do you have the idle mix screws set right? They are very dependent on the stepper motor pin positions.

How is the fast idle on the manual choke. When warmed up with the fast idle cam on the second from top step, you should have 1750 rpm.

Mike

86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's

Art Stewart wrote:

Reply to
Mike Romain

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