Carburetor - Off Idle Wide Open Throttle Hesitation

86chrysler6

Models


1985-1987 2.2L Carbureted Passenger Cars With Automatic Trans

1985-1986 California FWD Vans Equipped With 2.2L Carbureted Engines
- Automatic Trans

Subject


Off Idle Hesitation/Wide Open Throttle/ Ambients Above 85~ F


Index


DRIVEABILITY


Date

July 7, 1986

No.


18-30-86

P-2467
SYMPTOM/CONDITION

A condition of an off idle hesitation may occur during rapid "wide open throttle" acceleration from rest with a warm engine. This condition is worse with the air conditioning on and in ambients above 85~ F.

DIAGNOSIS

Thorough diagnosis should be performed using the Driveability Test Procedure. If no problem is found, it will be necessary to disconnect accelerator pump to properly diagnose problem. The accelerator pump will only be disconnected for diagnosis and must be reconnected before continuing with this procedure. Disconnect accelerator pump by removing the pump cover attaching screws; remove pump assembly and take out accelerator pump spring. Reinstall pump without spring and tighten screws. Road test vehicle. If the hesitation is reduced, continue with procedure.

CAUTION: BE SURE TO REINSTALL ACCELERATOR PUMP SPRING.

PARTS REQUIRED

Driveability Package PN 4419417

Contains the following:

1 Accelerator Pump Discharge Nozzle PN 4411993
1 Air Horn Gasket PN 4293836
1 Feedback Solenoid Gasket PN 4271873
1 Feedback Solenoid O-Ring PN 4267165
2 Discharge Nozzle Gasket PN 4411992
1 Authorized Modification Label PN 4275086

REPAIR PROCEDURE

This repair procedure involves replacing the existing accelerator pump discharge nozzle with a new one.

1. Remove air cleaner assembly.

FIGURE 1 - REMOVING THE CHOKE ROD:

2. Disconnect choke operating rod (Figure 1).

FIGURE 2 - REMOVING THE O2 FEEDBACK SOLENOID:

3. Remove O2 feedback solenoid retaining screws and lift out solenoid from air horn (Figure 2).

FIGURE 3 - REMOVING THE AIRHORN:

4. Remove five air horn attaching screws and separate air horn from carburetor body (Figure 3).

FIGURE 4 - REMOVING THE ACCELERATOR PUMP DISCHARGE NOZZLE:

5. Remove accelerator pump discharge nozzle screw, discharge nozzle, and both gaskets (Figure 4).

6. Install new accelerator pump discharge nozzle, PN 4411993, using the two new discharge nozzle gaskets, PN 4411992, supplied.
7. Reinstall the air horn assembly using supplied gasket, PN 4293836.

FIGURE 5 - INSTALLING NEW O-RING ON O2 FEEDBACK SOLENOID:

8. Position supplied O2 feedback solenoid gasket, PN 4271873, on the air horn. Install new O-ring, PN 4267165, on feedback solenoid (Figure 5). Lightly lubricate O-ring with white grease and carefully install solenoid into air horn. Reinstall solenoid attaching screws and tighten.
9. Reinstall air cleaner assembly.

FIGURE 6:

10. Type information on Authorized Modification Label, PN 4275086, as illustrated in Figure 6. Install label next to or near original VECI label.
POLICY: Reimbursable within the provisions of the warranty


TIME ALLOWANCE:
Labor Operation No. 14-30-39-91 1.0 Hrs.


FAILURE CODE: AM - Authorized Modification