DELCO-REMY Electronic Spark Selection: Testing: Decoder
- With ignition on, check voltage at decoder 4-wire connector Pink wire. Reading should be within 2 volts of battery voltage.
- With engine at normal operating temperature, disconnect and plug vacuum hoses at distributor and parking brake. Check ignition timing and adjust if necessary. See Emission Control Tune-Up Decal in engine compartment for specifications.
- Disconnect 3-wire connector from EGR solenoid to decoder (Brown wire at decoder). Do not disconnect EGR solenoid 2-wire connector from manifold harness.NOTE: 1979 carbureted vehicle do not have EGR solenoids. Disconnect 3-wire connector to coolant temperature sensor on these vehicles.
- Ignition timing should retard when step 3 ) is performed. If not, check for open in Brown wire. If Brown wire checks okay, replace decoder. Reconnect EGR solenoid 3-wire connector (coolant temperature sensor on 1979 carbureted models).