Carburetor - Idle Speed Adjustment on A/C Install

84chrysler7

Models


1984 Colt (W/O Turbo), Ram-50, Power Ram-50 (W/O Diesel) & Colt Vista


Subject


Idle-Up Speed Adjustment After Air Conditioning Installation and/or Service


Index


FUEL

Date

May 7, 1984


No.


14-19-84

P-1927-C
This procedure modifies the adjustment procedures in the subject model service manuals.

If difficulty is encountered in adjusting curb idle speed and/or idle-up speed after installation or servicing and adjustment of the air conditioning system, follow the adjustment procedure as outlined below:

ADJUSTMENT PROCEDURE

1. Thoroughly warm up engine, turn off all accessories, front wheels in straight ahead position, transmission in neutral, parking brake set, and radiator cooling fan stopped.

FIGURE 1:

FIGURE 2:

2. Check and adjust curb idle speed if necessary (see Figure 1 for specification) and make adjustment using SAS (speed adjusting screw) 1 (Figure 2). On some models installation of air conditioner will change the curb idle speed already adjusted.

FIGURE 2:

3. Back off the idle-up speed adjusting screw for air conditioner one turn from fully tightened position (Figure 2).

4. Lift the free lever by hand until it touches SAS 3 and record the engine speed ("N" = R.P.M.) obtained at this time (Figure 2).

FIGURE 1:

FIGURE 2:

5.. Turn on air conditioner switch. Adjust the idle-up speed while compressor is running to the specified rpm (Figure 1) by turning SAS 2 (Figure 2). When making this adjustment, be sure to record the turning direction and slot angle of SAS 2.

FIGURE 1:

6. Turn off air conditioner switch and make sure that the specified curb idle rpm is obtained (Figure 1).

7. Race the engine at a speed of about 2000 rpm for five seconds.

8. Turn on and then off the air conditioning switch repeatedly several times and make sure that with the compressor running that the engine is running at the specified idle-up rpm (Figure 1).

FIGURE 2:

If necessary, turn off the air conditioning switch and make a fine adjustment to the idle-up speed adjusting screw for air conditioner (Figure 2). (Turning this screw clockwise will decrease the engine speed, turning it counterclockwise will increase engine speed.)
9. Turn SAS 3 through an angle twice the turning angle of SAS 2 as recorded in Step 5, in the same direction as SAS 2.

Example: If Sas 2 has been turned 180~ clockwise in Step 5, SAS 3 will be turned 360~ clockwise in Step 9. Then, lift the free lever by hand until it touches SAS 3 and make sure that the engine rpm is "N" +/- 100 rpm (where "N" is the rpm recorded in Step 4). If necessary, adjust using SAS 3.

FIGURE 2:

SIMPLE ADJUSTMENT PROCEDURE FOR COLT VISTA ONLY

If the idle adjustment has been properly made before installation of the air conditioner, the following simple procedure may be used:

1. Give one clockwise turn to SAS 2 (Figure 2).

2. Give two clockwise turns to SAS 3 (Figure 2).

3. Back off idle-up speed adjusting screw for air conditioner one turn from fully tightened position (Figure 2).

FIGURE 1:

4. Lastly, make sure that the curb idle speed and idle-up speed are properly adjusted (Figure 1).

FIGURE 2:

If necessary, make fine adjustments with SAS 2 and SAS 3 (Figure 2).
POLICY: Reimbursable within the provisions of the warranty


TIME ALLOWANCE:
Labor Operation No. 14-30-07-96............................ 0.4 Hrs.


FAILURE CODE: 31 - Rough Idle