1990_XR7SC
Registered User
I just purchased my 90 xr7 and I live at 6400 feet. I am only seeing 12-14in (hot)of vacume and 9-10psi @ 5000rpm. I know my mustang that is turbocharged lost about a psi of boost when I moved up here from 1400 ft. and I lost a few inches of vac as well. are you guys seeing a big loss of boost at these altitudes or do I have a big vac leak somewhere? I have allready found 2 leaks and have fixed them.(one on the inlet side and one on the intercooler.) couldn't find any others. thanks for any help.