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bluedaffy 03-23-2012 12:06 PM

Rough cold idle blues
So when I first start my YJ for the day (4.2 w/ 32/36 weber), she jumps right up to 2000-2500 rpms and runs smooth for a few seconds and then starts to hiccup and become rough. Then when she is fully warmed the idle is nice n' low around 600-700 and smooth. No complaints about driveablilty or warm idle... just the cold start with the choke engaged. she's nuttered...

Anybody know what may be happening?

bluedaffy 03-23-2012 07:41 PM

Anybody? Is it rich or lean? Am I turning the key the wrong way? Starting it with my left hand instead of my right?

pete1991YJ 03-23-2012 10:26 PM

I have a feeling the choke isn't letting off quickly enough. But I'm not a Weber expert. Some other guys here are, I'm trying to recall their names. Old4x could certainly help. Mcmud is the total expert. Take a look at this thread and ask them:

tslroper 03-23-2012 10:26 PM

Put a voltmeter on the wire running to the intake manifold heater. If the relay or fused burnt up it wont power on and it'll run rough until warmed up.

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