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my car has idle problems when its cold I have to hold the gas untile it worms up a little bit I was thinking it was ether my wax pellit ,fast idle cam or my bac valve , and I read in the haynes manulle to check the bac valve you unplug it wile the cars runing to see if the idle changes I unpluged it and the idle didnt change so would that be my bac valve
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