Thread: NPP Dual Mode Question (Can't find this anywhere!)
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Old 03-26-2017, 11:53 PM   #38
Mr. Wyndham
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Quote:
Originally Posted by camaro5 View Post
They are operated by engine vacuum,which is not present at start-up.

NPP always open before vacuum generated.
I thought Gen 6 NPP valves use electric motors, now?
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