Just installed a boost gauge on my S14 Series 1 with a sr20det engine
I used the tee piece on the vacuum line that goes to the Waste gate valve control solenoid,
And its only reading around 5 - 10 vac in-hg. The compression of the engine on all cylinders is 125psi.
Running a HKS turbo on 10 pounds of boost, when i release throttle on boost the vac reads about 18-20
My idle is between 1000 - 1200 rpm. runs smooth never stalls by it self.
Once i come off boost and stop every now and then the engine revs up and down a few times, dont think that would be related to low vacuum though.
Did i plug into the wrong vacuum hose or is would it be something more serious ?