2001cherokee

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Question Asked: what vacuum activated sensors or solenoids turn on after 1.2miles or 3 minutes?
November 24, 2011, 09:19 AM
after above time frame, I get avery loud whistling noise from engine area.Lines and boots are ok. Noise goes away when accelerating but return when pedal is released. I can shut engine for exactly 2 minutes and all is fine till I drive 1.2 miles or 3 minutes. This is not belt or pulley noise.
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