Problems with weber carb -
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post #1 of 3 Old 08-01-2013, 04:56 PM Thread Starter
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1988 YJ Wrangler 
Join Date: Jan 2007
Location: new brunswick, canada
Posts: 23
Problems with weber carb

I installed a used weber carb on my yj lately and it's hard to start when the engine is warm. After I put in the weber it wasn't idling very well so I took it apart and cleaned it and it was much better. It starts right up when it's cold and runs really well, but if I shut it off after the engine is warmed up, then it's hard to start. I know some people say that some webers run too rich, so could that be my problem? By the way the carb is a 32/36 and I did put in a fuel pressure regulator set at 4 psi. Can anyone please help me out. Thanks.

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post #2 of 3 Old 08-01-2013, 04:58 PM
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1989 YJ Wrangler 
Join Date: Feb 2011
Location: Phoenix
Posts: 1,704
Boiling gas? Otherwise probably too rich. Try starting it hot with your foot to the floor. That ought to lean it out some.

Also make sure your needle valve in your bowl isn't sticking closed. Mine was doing that. Had troubles sometimes starting it when hot for some reason.

89 YJ.. My first jeep and I won't let it go. ▀||||▀

Current Project: None... I disgust myself.

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post #3 of 3 Old 08-01-2013, 05:43 PM
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1989 YJ Wrangler 
Join Date: Jan 2013
Location: West Columbia
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If you have set the lean best idle correctly & are having hard starting once warm the you are probably experiencing vapor lock (i.e. boiling gas). Search the forum for 'fuel boiling in carb'. I experienced the same issue & started that thread.

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Originally Posted by Rproject View Post
The only thing I can say is to close your eyes. Seriously. If you close your eyes and pay attention to your finger tips, you'll be able to feel the nuts better and manipulate them easier.
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