Engine Controls - Rough Idle/DTC's P0300-P0306: Overview

No.: TSB-05-13-004REV

DATE: March, 2005

MODEL:
See below

SUBJECT:
PCM REPROGRAMMING FOR COLD ENGINE MISFIRE / HOT SOAK RESTART / ROUGH IDLE

This bulletin supercedes TSB-05-13-004, to correct the affected vehicles. Revisions are indicated by >. This bulletin replaces TSB02-13-015REV and TSB-04-13-006, to provide updated reprogramming information.

PURPOSE

Incorrect PCM software parameters may cause one or more of the following conditions:

^ Hot soak restart and rough idle within 30 minutes of engine shutdown

^ DTC P0300 - P0306 (cold engine misfire)

^ Fuel pump noise or rough idle with no DTCs set (Eclipse and Eclipse Spyder only)

Reprogramming the PCM as described in this bulletin will eliminate these conditions.

For only Galant V6 vehicles produced before 11/1/00, replace the spark plugs after reprogramming the PCM, if they have not already been replaced under TSB-02-13-015REV. Check on the Warranty Superscreen to confirm whether they were already replaced. Refer to Step 14 in this bulletin.
For 2000-2003 Eclipse and 2001-2003 Eclipse Spyder models with engine number lower than PS5961 only: If not already replaced under TSB-04-13-006 or TSB-03-13-002, replace the thermostat valve after reprogramming the PCM (see Step 13). Check on the Warranty Superscreen to verify the engine number, and to confirm whether it was already replaced.

For all affected vehicles, these repairs may reduce a possible fuel pump noise during start-up, but will not eliminate it. Do not replace the fuel pump if the noise is not eliminated after reprogramming.

AFFECTED VEHICLES
> 1999-2003 Galant equipped with V6 engine
> 2000-2005 Eclipse equipped with V6 engine (without variable induction)
> 2001-2003 Eclipse Spyder equipped with V6 engine (without variable induction)

PARTS INFORMATION





Use the Genuine Mitsubishi Parts shown.





WARRANTY INFORMATION

For spark plug replacement, normal warranty procedures apply.