Reference Pressure Regulator Test

Install "T" fitting at connection "A". See Fig 1. Connect a vacuum gauge to "T" fitting. Start engine and run at idle. Note vacuum reading. Compare reading with specification, and replace pressure regulator if vacuum reading is incorrect. See ALTITUDE COMPENSATED VACUUM  table.

Fig 1: Testing Reference Pressure Regulator Install vacuum gauge "T" fitting at connection "A".

Fig 2: Testing Turbo Boost Cut-Out Switch

Fig 3: Glow Plug Diagnosis

Fig 4: Test B

Fig 5: Test C

Fig 6: Test D