View Full Version : vaccuum

01-21-2004, 01:30 PM
as you guys know how cold its been latley anyway i bought a 89SC
and it takes forever to warm up but it sits at about 25vac for the first 20min of running time than levels out to like 21vac where it should be, is this normal?

01-21-2004, 02:44 PM
That's not normal, IMO. My car idles at nominal 800-900 RPM @ 20-21 Hg, after a 15-30 second VERY cold start.

What's the idle RPM, when it's @ 25 Hg?

01-21-2004, 02:52 PM
about 750rpm idle
maybe the gauge is off because i have no cats and a cold air intake?
but after time it does go up to normal vac