I just got my boost vac gauge installed in the car, and I noticed that I was getting -7 psi for idle. That is about 14.25 inches of mercury, and I was wondering if this was normal, of if I need to be checking for leaks.
that's pretty low for idle. things like vacuum don't change much for engine size. briefly I thought it might be the turbo but it shouldn't be doing anyhting at idle. I'd start by checking for vacuum leaks and that the throttle plate is closing fully.
1991 Toyota Pickup 22R-E 2.4 I4/5 speed
1990 Toyota Cressida 7M-GE 3.0 I6/5-speed manual
mechanic, carpenter, stagehand, rigger, and know-it-all smartass
"You don't get to judge me for how I fix what you break"
Try reving it up and see if the vacuum increases. An engine that small doesn't generate a lot of vacuum at idle because of all the losses moving four small pistons but reving it up should make a little more vacuum.