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Message: <blockquote data-quote="cobra97" data-source="post: 569760" data-attributes="member: 10165">Kenne Bell units for 96-98 cobras dont use bypass valves. Can anyone tell me why not. I have a problem where my stang with kb 1.5l is not boostingeveryone is saying bypass valve must be stuck open, but their is no bypass on this unit. I have checked vaccum lines, all looks good their.belt is not slippingIn addition now I have a check engine light and rough idle, smell like it is burning rich.Sum it all up:1. Why no bypass valve on kb units for these models?2. what could be my problem based on the fact I am not making boost, have check engine light, rough idle, burning rich.</blockquote>