ECM - Poor Throttle Performance on Deceleration

BULLETIN NUMBER
SB93-02-001

ISSUE DATE
July 1993

GROUP
FUEL

RODEO (UC) AND PICKUP (TF) POOR THROTTLE PERFORMANCE AT DECELERATION (3.1L V6 ENGINE)

AFFECTED VEHICLES

1991-92 Rodeo (UC) and Pickup (TF) models equipped with 3.1L V6 engine and manual transmission.

SERVICE INFORMATION

Affected vehicles may experience poor throttle performance during deceleration, due to premature fuel cut after clutch disengagement.

To correct the fuel cut timing and eliminate this condition, install a new, recalibrated PROM (listed in "Parts Information" section of this Service Bulletin) in the Electronic Control Module (ECM).

SERVICE PROCEDURE

Replace the PROM (computer chip) in the ECM as follows:

1. Remove ECM as described in the appropriate Workshop Manual.

2. Remove PROM (computer chip) from ECM.

3. Install a new, improved PROM, using parts listed in "Parts Information" section of this Service Bulletin. Refer to the installation instructions included with the PROM.

4. Reinstall ECM as described in the appropriate Workshop Manual.

NOTE:
After installing the new PROM, the initial engine start-up rpm will be slightly higher than normal, then stabilize to normal rpm after a few seconds.





PARTS INFORMATION

FLAT RATE MANUAL UPDATE INFORMATION





Use the existing labor operation: