Engine - Stalls/Hesitates When Cold: Overview

85isuzu01
# SB85-02-002 December 20, 1985 FUEL

I-MARK (JT) COLD ENGINE STALL/HESITATION

VEHICLES AFFECTED

Isuzu 1985 I-Mark (JT) models with automatic transaxle.

SERVICE INFORMATION

On affected vehicles, the engine may stall/hesitate when cold. This usually occurs when the driver shifts from "P" to "R" or when the vehicle begins to move. To improve driveability, Isuzu has developed a new PROM (computer chip) to be installed in the ECM (electronic control module). The accelerator pump linkage has also been redesigned to increase fuel delivery on acceleration. These two components complement each other and must be installed at the same time.

PARTS INFORMATION

The following parts are available from your facing Parts Distribution Center:
Part Number Description
8-94426-420-0 ECM PROM, Federal Models
8-94426-419-0 ECM PROM, California Models
8-94426-520-0 Accelerator Pump Lever Kit

SERVICE PROCEDURE