280ZX L6-2753cc SOHC Turbo (L28ET) (1983)
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.