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Technical
Just won't idle - losing the plot - what else can I try?!
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<blockquote data-quote="dustrat" data-source="post: 577229" data-attributes="member: 20238"><p>You seem to be having your fair share of problems with that carb. Go back to basics.First remove idle jets. These are on the right hand side of carb which at 4 to 5 oclock to choke. 1 is straight forward screw out and the other you screw the blanking plug out and use a thin screwdriver to get at jet which is recessed inside. Make sure these are clean and then use airline to blow out any blockage that could be there.Have you altered the screw on throttle arm? To set the fast idle adjuster make sure you pull the choke off and then scew adjusting screw in so it is just touching cam and then screw it in 1/4 turn.Once this set do NOT alter. as this sets the throttle buterfly. Next turn the volume control screw( the smaller one ) in and turn it out 2 1/2 turns and the larger screw,bypass out about 2 turns.Start engine and ajust bypass screw to get it to tickover at about 850 rpm. go back to volume control screw and ajust for fastest idle,ie 1/2 a turn in or out and then turn in slowly until revs drop and then use bypass screw to get revs back to about 850rpm. I've copied this from a article from Rob and Daves Aircooled Volkswagen Pages and have used it many times to set up 34 pict 3 carbs and I hope it works for you.</p><p>Robert</p><p>Just as after thought make sure your dizzy vacumm pipes are OK and that any vacumm intakes on carb that are not used are blanked off.</p></blockquote><p></p>
[QUOTE="dustrat, post: 577229, member: 20238"] You seem to be having your fair share of problems with that carb. Go back to basics.First remove idle jets. These are on the right hand side of carb which at 4 to 5 oclock to choke. 1 is straight forward screw out and the other you screw the blanking plug out and use a thin screwdriver to get at jet which is recessed inside. Make sure these are clean and then use airline to blow out any blockage that could be there.Have you altered the screw on throttle arm? To set the fast idle adjuster make sure you pull the choke off and then scew adjusting screw in so it is just touching cam and then screw it in 1/4 turn.Once this set do NOT alter. as this sets the throttle buterfly. Next turn the volume control screw( the smaller one ) in and turn it out 2 1/2 turns and the larger screw,bypass out about 2 turns.Start engine and ajust bypass screw to get it to tickover at about 850 rpm. go back to volume control screw and ajust for fastest idle,ie 1/2 a turn in or out and then turn in slowly until revs drop and then use bypass screw to get revs back to about 850rpm. I've copied this from a article from Rob and Daves Aircooled Volkswagen Pages and have used it many times to set up 34 pict 3 carbs and I hope it works for you. Robert Just as after thought make sure your dizzy vacumm pipes are OK and that any vacumm intakes on carb that are not used are blanked off. [/QUOTE]
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Just won't idle - losing the plot - what else can I try?!
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