PL720 2WD L4-2488cc 2.5L DSL (SD25) (1985)
Vacuum Amplifier: Testing and Inspection
1.
Disconnect hose that connects vacuum amplifier to EGR control valve and install ``T'' connector and vacuum gauge.
2.
With engine idling vacuum gauge should read 5.31-6.5 inches Hg. If reading is excessively outside range, replace amplifier.
3.
With engine speed at approximately 2000 RPM, vacuum gauge should read 11.18-12.76 inches Hg. If reading is outside range, replace amplifier.