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Discussion Starter · #1 ·
i have the k55138 weber in my 1990 yj w/ a 258. just wondering what way to go with tuning it better. i got the engine running a TON better than it was, but i still think it could be better.

when you first accellerate, there is a bit of hesitation before it kicks in; also when you are going around corners and go to hit the gas again.

what's the best way to tell if it is running rich/lean, and how do you tell what size jets to use??

it came with a bunch of extra jets too, so i'm sure it can be more finely tuned

any tips/links would be appreciated, as i cannot find anything other than basic tuning procedures
 

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NO. #41 is your accel pump, I forget the specifics of adjusting it, but somehow you need to adjust the rod or the cam so that the stroke of the accel pump is bigger, thus pushing more fuel with you hit the skinny pedal, thus eliminating that "lag."
 
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