Grand Fury/Salon V8-318 5.2L VIN P 2-bbl (1984)
Idle Speed/Throttle Actuator - Electronic: Testing and Inspection
The electronic throttle control system is incorporated in the Spark Control Computer models. A carburetor mounted solenoid is energized whenever
the air conditioner, electronic heated backlite or electronic timers are activated. The timers operate with a two second delay after the throttle is closed or
with an EGR time delay after an engine start condition.
1.
Connect tachometer to engine, then start engine and run until operating temperature is reached.
2.
Depress accelerator, then release. Curb idle speed should increase for length of time of EGR schedule.
3.
Curb idle speed should increase when air conditioner, and/or electronic heated backlite are operated and return to normal when components are
turned Off. Air conditioner clutch will cycle on and off as air conditioner operates and should not be mistaken as part of electronic control
system operation.
4.
If curb idle speed does not increase and decrease as described above, disconnect three-way electrical connector from carburetor.
5.
Connect ohmmeter between carburetor solenoid black wire terminal and ground. Resistance should be 15-35 ohms. If not, replace solenoid.
6.
Start engine and measure voltage between black wire of three-way connector and ground before time delay has timed out. Voltmeter reading
should indicate charging system voltage. If not, replace Spark Control Computer or cowl mounted gray start timer as necessary.
7.
With engine operating and voltmeter connected as described in step 6, turn on air conditioner and/or electronic heated backlite. Voltmeter should
read charging system voltage after time delay has timed out. If not, check wiring between three-way harness connector and instrument panel for
damage and repair as necessary.
