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930 idle flucuate
help, my 1979 930 will start fine when cold, idle high initially but then when the idle comes down it will flucuate (oscillate) up and down 500-2000 rpm for 4-5 times before idling steady around 900 rpm. It has an MSD ignition, K2700 turbo, and GHL muffler. What could cause it to do this? Auxcillary valve? hipdoc
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