Idle Speed/TP - Adjustment/Operation
83amcjeep211E100
DECEMBER 1983
EAGLE/JEEP 1983-84
FUEL SYSTEMS Attention: Workshop, Parts Department.
IDLE SPEED ADJUSTMENT AND SOLE-VAC (THROTTLE POSITIONER) OPERATION 2.46 4-CYLINDER AND 4.2L 6-CYLINDER ENGINES.
Information This I.S. Note provides information on idle adjustment and sole-vac operation that will help to avoid misadjustment or unnecessary sole-vac replacement.
NOTE: Do not attempt to adjust idle speed to improve idle quality until the vehicle has at least 100 miles on it. This period of operation allows the engine to normalize (wear-in). Adjustments made prior to normalization will only have to be redone.
SIX-CYLINDER IDLE ADJUSTMENT
1. Sole-Vac Vacuum Actuator Adjustment
a. Disconnect and plug the vacuum hose to the sole-vac vacuum actuator.
b. Disconnect the sole-vac electrical connector.
c. Connect an external vacuum source to the vacuum actuator and apply 10-15 inches (Hg.) of vacuum.
d. Open throttle for at least 3.0 seconds (1200 rpm); then close throttle.
e. Set the speed using the vacuum actuator adjustment screw on the throttle lever to obtain specified rpm.
f. Disconnect the external vacuum source.
g. Reconnect the sole-vac vacuum hose and electrical connector.
2. Sole-Vac Holding Solenoid Adjustment
NOTE: The sole-vac vacuum actuator adjustment should always precede the sole-vac solenoid adjustment.
a. Disconnect and plug the vacuum hose to the sole-vac vacuum actuator.
b. Disconnect the sole-vac electrical connector.
c. Energize the sole-vac holding solenoid with either of the two following methods:
^ Apply battery voltage ( + 12V) to the solenoid, or
^ Reconnect the sole-vac electrical connector and turn on the rear window defogger or turn on the air conditioner with the compressor disconnected.
d. Open throttle for at least 3.0 seconds (1200 rpm) to allow the sole-vac holding solenoid to fully extend.
e. Set the speed using the 1/4" hex-head adjustment screw on the end of the sole-vac unit to obtain the specified rpm.
f. Reopen the throttle above 1200 rpm to insure the correct holding position and reset speed if necessary.
g. Reconnect the vacuum hose to the sole-vac actuator.
h. Reconnect the sole-vac electrical connector if disconnected.
4-CYLINDER IDLE ADJUSTMENT
1. Fully warm-up the engine.
2. Choke Fast Idle Adjustment.
a. Disconnect and plug the EGR valve vacuum hose.
b. Position the fast idle adjustment screw on the second step of the fast idle cam with the transmission in neutral.
c. Adjust fast idle speed to: 2000 rpm - Man. Trans./2300 rpm - Auto. Trans.
d. Allow the throttle to return to normal curb idle and reconnect the EGR vacuum hose.
3. Sole-Vac Vacuum Actuator Adjustment
a. Remove the vacuum hose to the vacuum actuator and plug the hose. Connect an external vacuum source to the actuator and apply 10-15 inches Hg. of vacuum to the actuator.
b. Shift transmission to Neutral.
c. Adjust idle speed to the following rpm using the vacuum actuator adjustment screw on the throttle lever: 850 rpm - Auto. Trans./950 rpm - Man. Trans. The adjustment is made with all accessories turned off.
NOTE: The curb idle should always be adjusted after vacuum actuator adjustment.
4. Curb Idle adjustment
a. Remove the vacuum hose to the sole-vac vacuum actuator and plug the hose.
b. Shift transmission into Neutral.
c. Adjust the curb idle using the 1/4" hex-head adjustment screw on the end of the sole-vac unit.
Set speed to: 750 rpm - Man. Trans./700 rpm - Auto. Trans.
NOTE: Engine speed will vary 10-30 rpm during this mode due to closed loop fuel control.
d. Reconnect the vacuum hose to the vacuum actuator.
5. TRC Adjustment (Anti-Diesel)
The TRC screw is preset at the factory and should not require adjustment. However, to check adjustment, the screw should be 3/4 turn from closed throttle position.
Sole-Vac (Throttle Positioner) Operation - 6-Cylinder
Engine Sole-Vac Component Function
Operation
Phase Sole, Vac Vacuum Actuator Sole-Vac Holding Solenoid
At start up Energized for minimum of 15 seconds Energized for minimum of 60 seconds
Warm-up Energized until carb. air temp. exceeds Energized until engine coolant temp.
Phase 13~C (55~F) exceeds 57~C (135~F)
During Energized
accessory
loads (AC,
defogger,
headlamps,
power steering)
When idle Energized Energized
speed drops (NOTE: Solenoid remains energized
below pre- until throttle is held open for at least
determined 3.0 seconds.)
rpm (1)
When throttle Energized for 0.1 seconds Energized for 2.5 seconds
is moved from
closed (idle) to
open (acceleration
- cruise) or when
idle speed drops
below pre-determined
rpm(2)
(1) 550 rpm manual transmission-low altitude models
600 rpm manual transmission-high altitude models
435 rpm automatic transmission-low altitude models
550 rpm automatic transmission-high altitude models
(2) 650 rpm on low altitude models
725 rpm on high altitude models
Sole-Vac (Throttle Positioner) Operation - 4-Cylinder
Engine Sole-Vac Component Function
Operation
Phase Sole-Vac Vacuum Actuator Sole-Vac Holding Solenoid
At start up Energized for minimum of 60 seconds Energized
Warm-up Energized until carb. air temp. exceeds Energized
Phase 13 0C (55~F)
During Energized Energized
accessory loads (AC, defogger, headlamps, power steering)
When engine Energized Energized
idle speed falls below predetermined rpm (1)
(1) 650 rpm on Man. Trans. models 600 rpm on Auto. Trans. models
NOTE: The holding solenoid is energized whenever the engine is running. It is de-energized only when the ignition is turned off.
Filing Instructions
File this I.S. Note in your M.R. 171 binder.