Engine Diagnostic Vacuum Gauge

A handy vacuum gauge behaver chart to help technician diagnosing engine problems

Intake manifold vacuum is a key indicator of engine performance.

By measuring vacuum under different engine loads and conditions, you can track down problems within your engine and make the necessary adjustments or repairs. The key is having a reliable engine vacuum gauge and then knowing how to read it properly.

This App explain what your vacuum gauge is trying to tell you.