Fuel System - Warm Idle Die Out

85chrysler13

Models


1985 Vehicles Equipped With 2.2L Turbocharged Engines


Subject


Intermittent Warm Idle Die Out With Vehicle at Rest


Index


DRIVEABILITY


Date

November 25, 1985

No.


18-40-85

P-4348-C
SYMPTOM/CONDITION

Intermittent idle die out on a fully warm engine following a deceleration or short duration on/off throttle movement with vehicle at rest. Vehicle will restart.

DIAGNOSIS

This condition may be difficult to duplicate because it occurs infrequently. Therefore, follow the Driveability Test Procedure to insure all systems are operating properly. If no problems are found using the Drive Procedure, perform the following repair procedure.

REPAIR PROCEDURE

This repair procedure will determine the following:

^ Ensure that the minimum air flow is set correctly on the throttle body.

^ Determine if a logic module with a change to read barometric pressure off idle is needed.

1. Connect a tachometer to engine.

2. Disconnect throttle body 6-way connector.

FIGURE 1:

3. Remove brown with white tracer wire from throttle body 6-way connector (Figure 1).
CAUTION: MAKE A NOTE WHERE WIRE WAS REMOVED FROM CONNECTOR SO IT CAN BE CORRECTLY REINSTALLED.

4. Reconnect 6-way connector.
5. Turn off all lights and accessories.

6. Apply parking brakes.

7. Place transmission in neutral.

8. Start engine and allow to warm to operating temperature (one minute minimum).

9. Connect one end of a jumper wire to the brown with white tracer wire (previously pulled from 6-way connector in Step 3) and touch the other end of the jumper wire to the positive battery post for five seconds.

10. Remove jumper wire.

11. Disconnect the radiator fan motor.

12. Disconnect engine coolant sensor connector. The power loss lamp on the instrument panel must come on.

13. Disconnect charge temperature sensor connector.

NOTE: ENGINE MAY STALL WHEN COOLANT AND/OR CHARGE SENSORS ARE DISCONNECTED. IF SO, PROCEED TO STEP 15.

14. Turn ignition off.

15. Restart engine and hold engine speed at 2000 RPM's for 30 seconds. (It may be necessary to use wide open throttle after two seconds of cranking to start engine.)

NOTE: IF ENGINE STALLS AND IS UNABLE TO MAINTAIN AN IDLE UPON RESTARTING, TURN THE IDLE AIR BYPASS SCREW ONE TURN COUNTERCLOCKWISE. REPEAT STEP 15.

16. Idle speed between 700 and 900 RPM is acceptable. If idle speed meets this specification, go to Step 18. Otherwise, proceed to next step.

FIGURE 2 - Wiring Connector:

17. To set RPM, turn idle speed adjusting screw (idle air bypass screw) until engine speed is 800 RPM (Figure 2). If speed will not adjust.
a. Inspect all linkage for binding. Repair as required.

b. If equipped with speed control, make sure servo cable is not holding throttle open. If so, adjust as required.

c. Remove all cables from throttle body and make sure throttle shaft is not binding. If it is, replace throttle body.

NOTE: ON VEHICLES WITH LESS THAN 300 MILES, REDUCE SPEED BY 75 RPM.
18. Turn engine off and reinstall brown with white tracer wire into 6-way connector. Disconnect and reconnect battery connector.

19. Reconnect radiator fan motor, coolant, and charge temperature sensors.

20. Start engine and let speed stabilize for one minute.

21. Engine speed should be within +/- 100 RPM's of specifications shown on the emission label.

22. If idle speed adjustment was not required, remove logic module and replace with appropriate part:

PN 5227243 to be used for 1985 Turbo Manual PN 5227245 to be used for 1985 Turbo Automatic

The above logic modules may be used as a service part for all 1985 turbo vehicles.


POLICY: Reimbursable within the provisions of the warranty


TIME ALLOWANCE:
Labor Operation No. 14-30-07-97 0.3 Hrs.
Check and Adjust Idle Speed

08-14-06-90 0.5 Hrs.
Check Idle Speed and Replace Logic Module


FAILURE CODE: AM - Authorized Modification