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high idle
Posted: Sun Jun 07, 2015 5:21 pm
by halimjimmy
I am new to this forum , I have 1974 Beetle ,just install a new 34 PICT 3 Carb ,Electronic Ignition , New Spark Plugs and Valve adjusted. Now I feel the the idle is high.
How can I solve this problem?
Re: high idle
Posted: Sun Jun 07, 2015 6:00 pm
by Marc
http://www.vw-resource.com/34pict3.html#carb
Was high idle a problem with the old carb? If so, suspect an induction leak (typically at the rubber bellows which connect the center section to the end castings, less often at the heads or carb base). If there's an intake leak you'll chase your tail forever trying to adjust the idle.
Timing's gotta be right, too - too much initial advance will cause a high idle speed that carb adjustments can't cure. Is it the 1974 "SVDA" carb (Bosch # 0 231 170 034)? For that one your base timing should be 7½° BTDC.