Electronic EGR System Test

NOTE: The electronic EGR control is incorporated into the Spark Control Computer on all models. Before proceeding with test, ensure engine temperature sensors are operating properly.

1. With engine cold and ignition Off, connect one lead of suitable voltmeter to gray wire terminal on EGR solenoid. Connect second voltmeter lead to ground.
2. Start engine and check voltmeter reading. Reading should be less than one volt. Reading will remain at this value until engine reaches normal operating temperature and electronic EGR schedule has timed out. EGR solenoid will then de-energize and voltmeter will indicate charging system voltage.
3. If system does not de-energize in specified amount of time, replace solenoid.
4. If voltmeter indicates charging system voltage before EGR schedule is complete, replace Spark Control Computer or cowl mounted timer as necessary. V8-318 non-California models equipped with 2 barrel carburetors have no thermal delay at ambient temperatures below 60°F. This engine will operate according to EGR time delay schedule only.
5. If an engine is started warm, the EGR solenoid will be energized for the duration of time delay schedule only. It will then de-energize.