6000 V6-173 2.8L VIN Z 2-bbl HP (1984)
EGR SOLENOID ASSEMBLY
The EGR solenoid is energized based on the following inputs:
^
Engine running above idle but less than WOT.
^
Engine coolant temperature 42.5~C (108~F) or above.
^
Transmission in gear.
The "pulse width" or "on time" for the EGR solenoid is determined by engine load input to the ECM.
1.
Checks for a stuck vacuum switch or grounded wire to ECM diagnostic switch input. Normally no code should set at idle since the diagnostic
switch should be open normally.
2.. By loading the engine in drive checks to see if the diagnostic switch senses EGR which is normal under load. If the "Check Engine" light "ON", a
fault is present.
