Hard To Start Cold Engine - Install Modified Pcm (01-006/99)

Publication date: 1999-04-02
Reference number: 01-006/99

HARD TO START COLD ENGINE - INSTALL MODIFIED PCM

TECHNICAL SERVICE BULLETIN

Reference Number(s): CAT. 01, NO. 006/99, Date of Issue: April 2, 1999

HARD TO START COLD ENGINE

Model(s): 1996-98 Mazda MPV

Category: 01 - Engines

Bulletin No.: 006/99

Date: April 2, 1999

VEHICLES AFFECTED

All 1996 MPVs.

All 1997-98 MPVs except two-wheel-drive California emissions vehicles.

DESCRIPTION

During cold weather conditions when the vehicle has been exposed to an ambient temperature of 0°C (32°F) overnight or several hours, engine is hard to start. Engine will crank and start at wide open throttle (clear flood mode). This hard to start condition is due to reformulated winter gasoline which easily vaporizes. It causes an over rich air fuel ratio when the coolant temperature is approximately 0°C (32° F). A modified Powertrain Control Module (PCM) is available which has a revised calibration to decrease the fuel injection pulse width when exposed to coolant temperatures of 0°C (32°F).

Customers having this concern should have their vehicle repaired using the following procedure.

REPAIR PROCEDURE

Verify customer concern.
Replace PCM with a modified part.
NOTE: PCM is located under passenger floor carpet beneath floor plate as shown in Fig 1 .
Verify repair.

Fig 1: Floor Plate

PARTS INFORMATION

Part Number	Description	Qty.	Notes
JEY1 18 880	PCM	1	1996 vehicles with VINS JM3 LV52** T0 804446 or lower
JEY4 18 880	PCM	1	1996 vehicles with VINS JM3 LV52** T0 804447 or higher
JEYA 18 880	PCM	1	CA 4WD and FED 2WD/4WD only.

WARRANTY INFORMATION

NOTE: This information applies to verified customer complaints on vehicles covered under normal warranty. Refer to the SRT microfiche for warranty term information.

WARRANTY INFORMATION

Description	Claim Information
Warranty Type	A
Symptom Code	02
Damage Code	9W
Part Number Main Cause	See PARTS INFORMATION
Quantity	1
Operation Number / Labor Hours	F0812XRX / 0.4