hi guys, I know low vacuum cause idle issues related to leaks. But what means a high vacuum read at idle 26-28 hg.

Any in specific to check?

b16a3 engine.
Civic ex 98


thanks for Any help.

 

Reading a vacuum gauge





eH.

 

Thanks for the link, actually confirms what I had already suspected on my own car.

 

Helpful, but the most confusing thing about that article is the fact that they say vacuum INCREASES to 25, when in reality the needle is moving backwards. Or they say it "drops" to 2. Well actually, it RAISES to 2, because vacuum is numbered negatively. So the pressure raises to 2, the vacuum drops to 2, the same dealio.

 

Although the number is actually negative, the gauge I use shows positive number. Just mentally put a - in front of the number, if that'll help you. Auto Meter 2610








eH.