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Emission Control Systems


IGNITION TIMING

Basic
Ignition Timing Connector Grounded 5~+/-2~ BTDC @ Curb Idle
Actual
Ignition Timing Connector Ungrounded approx. 5° BTDC @ Curb Idle
The ECM may further advance the actual ignition timing at high altitudes.

RESISTANCE VALUES

EGR Control Solenoid Valve [1] 36-44 ohms
EGR Temperature Sensor [1]
At 50~C (122~F) 60-83 k ohms
At 100~C (212~F) 11-14 k ohms
Oxygen Sensor
Below 20~C (68~F) Approx. 15 ohms
Above 400~C (752~F) 30 ohms or more
Purge Control Solenoid Valve At 20~C (68~F) 36-44 ohms

[1] California Models Only.