Rough Idle - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 09-10-2002, 05:03 PM
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Rough Idle

I'm trying to get my '80 CJ-7 up to par for the new requirements here in Texas (No attempted to inspect yet). I started with new plugs, wires, still idles rough (after it warms up). I adjusted the timing, and thought I had it until the engine got up to temp. As soon as it warmed up it was right back to sputtering, and idle dropped off again. I found the article in the tech section on cleaning the venturi valves(fuel drips only as I back off the trottle), and this will be my next step unless there are any other suggestions.

What's the association with the engine getting up to temp and the rough idle though if the choke is not engaged while cool?

If plugs, wires, timing, clean carb, doesn't keep the cloud of black smoke out of my rearview what's next?

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post #2 of (permalink) Old 09-10-2002, 05:55 PM
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Re: Rough Idle

The carb may be clean, but has it been adjusted, sounds like it might be running rich with the cloud of black smoke. This might explain the rough idle as well as gasoline vapor is what burns, not the liquid that could be causing the spuutering. When you pulled the plugs, if they were very black, that is s sign of incomplete combustion and would be another indication of running rich. So I'd adjust the carb floats a bit and see if that will lean the mix out some. If you have the funds I would recommend and after market ignition. I put a Jacobs Ultra Team on my 97 TJ and noticed a difference immediatly. Hope this helps. By the way I wish I still had my old CJ-7. man that thing was easy ti work on.
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