What Should My Vacuum Gauge Read At Idle

Here's everything you need to know about using a vacuum gauge as a tuning device A few great ways to dial things in and one. At idle the vacuum gauge's reading plus the scan tool's MAP value gives adds up to ambient or barometric pressure This of. Now if you get a good kit your vacuum gauge will come with a bunch of fittings that you can put on the end of it They have a.

I explain the theory behind why you should almost always use manifold vacuum to control your vacuum advance on a classic. Just a simple view of Engine Load MAP MAF and RPM pids. UPDATE i found that my distributor was off by 1 tooth causing all of the issues you see I moved it one tooth adjusted my idle.

Tuning my 74 Corvette with a vacuum gauge after rebuilding the carburetor. Every engine is different with vacuum sources but I hope this video sheds some light on how to diagnose an issue you may be. This video shows how to tune carburetor of a Toyota 4k engine using vacuum gauge and other instruments such as multi tester.