ECM - Engine Hesitation/Sag/Occasional Popbacks

89Chrysler15

Models

All 1988

N-Body Equipped With a 3.9L Engine and 4-Speed Automatic Transmission


Subject


Engine Hesitations, Sags, and Occasional Popback on Throttle Tip-In


Index


DRIVEABILITY


Date

October 16, 1989

No.


18-14-89

(C18-14-9)
P-3800
BODY CODE LEGEND

N - DAKOTA


SYMPTOM/CONDITION

A lean fuel calibration during cold open loop conditions and during warm low vacuum tip-in may cause cold and warm engine hesitations, sags, and/or occasional popbacks on throttle tip-in.


DIAGNOSIS

After using the DRB II and finding no fault codes present, proceed with the following repair procedure.


PARTS REQUIRED


1 Package, Module (Federal) P/N 4443973
Kit Contents:

1 SMEC 1 Restrictor 1 Hose

1. Package, Module (California) P/N 4443975 Kit Contents:

1 SMEC 1 Restrictor 1 Hose

1 Label, Authorized Modifications P/N 4275086

FIGURE 1:

REPAIR PROCEDURE


1. Remove the purge line from the front of the throttle body (Figure 1).
2. Insert one end of the in-line restrictor connector into the purge line hose.

3. Insert the other end of the restrictor connector into the short rubber hose (1/4 x 1.25 in.).

4. Connect the short hose to the nipple on the throttle body that the purge hose was removed from.

5. Remove the air cleaner duct from the SMEC.

FIGURE 2:

6. Remove the module mounting screws (Figure 2).
7. Remove 14- and 60-way wiring connectors from the SMEC and remove the SMEC.

8. Connect the 14- and 60-way connectors to the new SMEC.

9. Position the SMEC and install the retaining screws.

10. Install the air cleaner duct to the SMEC.

FIGURE 3:

11. Install the Authorized Modification Label noting the installation of the module package (Figure 3).
POLICY: Reimbursable within the provisions of the warranty


TIME ALLOWANCE:
Labor Operation No. 08-19-01-97 . . . . . . . . . . 0.4 Hrs.


FAILURE CODE: NP - Sags and Hesitations