This document is an instruction manual for the vacuum testing of engines
This manual provides step-by-step instructions for using the Actron CP7803 Vacuum Gauge/Pressure Tester Kit. It covers preparation steps such as disabling ignition systems and removing air filters to ensure accurate readings during engine testing.
The document details various diagnostic procedures including cranking vacuum tests, exhaust restriction checks, PCV valve operation verification, fuel pump pressure measurement, and volume flow testing. It also includes a parts list for repairing the kit.
| Warranty Period | One Year |
|---|---|
| Fuel Pump Pressure Range | 4 and 6 PSI |
A steady reading between 15 and 22 inches indicates a mechanically sound engine.
Unplug the PCV valve, crank the engine, and check that the vacuum drops to about one-half the value noted in the cranking vacuum tests.
Fuel pump pressure can be considered satisfactory if it is between 4 and 6 PSI.