Pressure
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Senior User
Joined: Aug 2008
Posts: 124
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From: Tuscumbia , Al
Pressure
78 F150 460 engine all factory air with York compressor . All new and ready for R134-a what should the High and Low pressures run Appox. Also has anyone tried the VOV Orifice ??
Fleet Mechanic
Joined: Feb 2006
Posts: 1,776
Likes: 5
From: Lorain County, Ohio
This is measured with the AC on Max, High blower, doors open and engine at 1500rpm.
You'll have a problem finding somewhere to put a VOV on you're 78. It uses an expansion valve. No orifice tube.
