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I went out and bought a HKS Blow Off Valve, had it installed into my 2018 Ford Ranger Widetrack 3.2 to find out later that BLOW OFF Valves don't work in Diesel engines............is there away around this or did I just buy and install a fancy ornament ???

Neil
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The purpose of a blow-off valve [typically] is to release boost pressure from the intake tract when the throttle valve is shut suddenly... but diesels DON'T HAVE THROTTLE VALVES!! Plus: I've never heard of a diesel--outside of extreme, race-only performance builds--ever needing one. A resized turbo, to eliminate surging on trucks used daily and/or for towing, yes... but never a blow-off valve.

And, uh... while you're at it: Please don't go "rolling coal". Black smoke is just energy wasted, according to turbocharging expert Gale Banks, and I'm not about to argue with him!
 
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