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Weber 40Dcoe Tuning Problem

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#1 A1111j


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Posted 10 February 2019 - 07:30 PM

Hi I have 1971 mini that I have just fitted a Weber40 DCOE to. I have one problem on the right have side of the carb it when you turn the adjustment screw not a lot really happens. I have bought a gunson colortune to Make sure and the the right hand side doesn’t adjust much. Like when I turn the screw in fully it’s still showing yellow and will not go to blue. I have check all the jets they are all the same on both sides. I just cannot get my head around it. Can someone please help?

#2 nicklouse


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Posted 10 February 2019 - 08:27 PM

the screws are just the idle. wind in fully and then back out about 2 turns. there is a given figure that i cant remember.  about a turn out start the car and then adjust then the same to give the smoothest idle. not really possible if you have a cam that needs a weber car.

#3 Retroman


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Posted 12 February 2019 - 05:41 PM

It could be a drilling or the idle jet obsured with a drop of water or muck


The actual jet needs taking out of the holder too, the hole is not very big


You can try blowing back through the drillings with an air line


Its one of those if you see it you might know what it was, a strip clean might cure it.


Could also be an air leak on that side



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