A/C Idle Up - Adjustment Procedure

85chrysler1

Models


1985 Colt & Colt Vista With Air Conditioning


Subject


A/C Idle-Up Adjustment Procedure


Index


FUEL

Date


January 7, 1985

No..


14-65-84
The A/C idle-up speed adjustment procedure for subject model vehicles was inadvertently omitted from the 1985 Colt Service

Manual, Publication #81-270-5011, and 1985 Colt Vista Service

Manual, Publication #81-270-5012.


The attached adjustment procedure should be copied and added to or noted on page 14-15 of Colt Service Manual and page 14-19 of Colt

Vista Service Manual.


POLICY: Information only
ADJUSTMENT PROCEDURE

Install tachometer and prepare vehicle for idle setting as follows:

^ Bring engine to full operating temperature (coolant temperature 185~ to 205~ F).

^ All lights and accessories off.

^ Transaxle in neutral.

^ Radiator fan off (disconnect fan if necessary).

^ Parking brake applied.

^ Vehicles with power steering - position the front wheels straight ahead to prevent loading the pump.

1. Be certain curb idle speed is set to emission label specifications. Adjust if necessary.

2. Check throttle opener set engine Speed and adjust if out of specification, using the 1985 Colt Service Manual procedure on page 14-15 and 1985 Colt Vista Service Manual procedure on page 14-9.

"Throttle opener set engine speed specifications."

750 +/- 50 RPM - Colt Vista 850 +/- 50 RPM - Colt

3. Turn air conditioning on with blower on low speed.

FIGURE 1 - Adjustment Procedure:

4. Check idle-up engine rpm with compressor clutch engaged. Adjust if necessary to 850 +/- 50 rpm using the idle-up adjusting screw on end of throttle lever (Figure 1).

NOTE: CYCLE A/C SWITCH ON AND OFF SEVERAL TIMES TO CHECK IDLE-UP ACTUATOR OPERATION.

Idle-Up Adjustment For Air Conditioned Colt Turbos

The idle and idle-up engine speed is controlled by the idle speed control motor.

If the engine looses or gains an excessive amount of rpm when the A/C is turned on, perform the idle speed control and throttle position sensor adjustment as described in the 1985 Colt Service Manual, Publication #81-270-5011, on pages 14-16 to 14-17.

The A/C idle-up speed itself cannot be adjusted, but it is dependent on correct idle speed adjustment.

Idle-up speed (Turbo) - 850 +/- 50 rpm.