Quote: If it only happens every time the vacuum is at a certain point you may be able to chase it down.
I've never had to check vacuum while driving a vehicle so I'm not sure what is normal. I know it's normal for vacuum to drop when you accelerate but idk how much, anyways. While coasting I get around 19hg with a steady needle. When I stab the gas it drops to 5 or 6 and when it stutters and stalls it drops to nothing.
