Re: Swapped PCV & gained big time!
Ya, I'm not gonna make any claims in improved gas mileage.
I'll leave the logic behind it's design and function to thier website. It convinced me to try it. As I said, it smoothed out my idle, gained 5 inches of vacuum and improved throttle response. My simple mind thinks of the pcv as a big vacuum leak sucking in contaminated air. Being able to restrict it at idle and open it up during cruise when the engine is creating more vapor makes sense to me.
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