From what I have read there are two fuel pumps on the cx-7, there is a fuel filter on the pump that is inside the fuel tank and is part of the fuel pump. This bulletin may apply to you if you are having a performance problem.
2008 Mazda Motor of America, Inc.
Subject:
ROUGH IDLE, LACK OF POWER, AND/OR MIL ON WITH DTC P2177/P2187 (FUEL
SYSTEM LEAN)
Bulletin No: 01-022/08
Last Issued: 04/02/2008
Service Bulletin Mazda North American Operations
Irvine, CA 92618-2922
MULTI-MODEL- ROUGH IDLE, LACK OF POWER, AND/OR MIL ON WITH DTC P2177/P2187 (FUEL SYSTEM
LEAN)
BULLETIN NOTE
This bulletin supersedes the previous bulletin issued on 03/27/08. The REPAIR PROCEDURE has been
revised.
APPLICABLE MODEL(S)/VINS
2007-2008 Mazdaspeed3 vehicles with VINs lower than JM1BK**** ** 859606 (produced before November 22,
2007)
2006-2007 Mazdaspeed6 vehicles
2007-2008 CX-7 vehicles with VINs lower than JM3ER**** ** 196510 (produced before November 19, 2007)
DESCRIPTION
Due to low fuel pressure at the high-pressure fuel pump, some vehicles may experience the following:
Rough idle, stall, and/or hesitation under cold conditions.
Intermittent lack of power during acceleration when the engine gets hot.
MIL turns on with DTC P2177/P2187 (fuel system too lean at off idle).
This is caused by a delayed fuel pressure build-up from the high pressure fuel pump. There are two main reasons
for this:
1. The drive current from the PCM is not enough for some fuel pumps.
2. Some fuel pumps have slower response.
To fix the problem, the PCM software and the specification of the high-pressure fuel pump have been changed.
Customers having this concern should have their vehicle repaired using the following repair procedure.
REPAIR PROCEDURE
1. Reboot the IDS to clear memory before reprogramming.
2. Using IDS 51.9 or later software, reprogram the PCM to the latest calibration (refer to Calibration Information
table) by following the Module Reprogramming procedure.
NOTE:
Always update the IDS tool first, then follow on-screen instructions to download the needed calibration
file for PCM reprogramming.
It is not necessary to remove any fuses or relays during PCM reprogramming when the IDS
screen prompts you to do so. You may accidentally stop power to one of the PCM terminals and
cause the PCM to be blanked, or you may receive error messages during the IDS reprogramming
procedure.
Bulletin No: 01-022/08
2008 Mazda Motor of America, Inc.
Last Issued: 04/02/2008
Page 2 of 6
IDS shows the calibration part numbers after programming the PCM.
Please be aware that PCM calibration part numbers and file names listed in any Service Bulletin
may change due to future releases of IDS software, and additional revisions made to those calibrations
for service related concerns.
When reprogramming a PCM, IDS will always display the latest calibration P/N available for
that vehicle. If any calibration has been revised/updated to contain new information for a new
service concern/issue, it will also contain all previously released calibrations.
When performing this procedure, we recommend that a battery charger be installed on
the vehicle battery and turned ON to a maximum charge of no more than 20 AMPS to
keep the vehicle battery up to capacity. If you exceed 20 AMPS, it could damage the VCM.
3. For vehicles built before April 7, 2007 that are experiencing the conditions as noted in this service bulletin
after the PCM calibration update, perform a Warranty Vehicle Inquiry using your eMDCS System and
inspect Warranty Claim Inquiry Detail for high-pressure fuel pump replacement.
If no prior history of replacement, replace the high-pressure fuel pump. Refer to MS3 online instructions
or Workshop Manual section 01-14 FUEL PUMP UNIT REMOVAL/INSTALLATION.
If the history indicates part number L3K9-13-35ZB was used during a repair, use the following illustration
to inspect the production date of the high-pressure fuel pump. Replace it if the production date is before
March 26, 2007.
Date of production is marked as a 4 digit code YMDD at the pipe.
Y for Year 4 for 2004....7 for 2007
M for Month 1 for Jan....9 for Sept, X for October, Y for Nov, Z for Dec
DD for Date 01 for 1st of month....31 for 31st of month
Example 4Z16 means Dec 16, 2004; 7608 means June 8, 2007
Bulletin No: 01-022/08
2008 Mazda Motor of America, Inc.
Last Issued: 04/02/2008
Page 3 of 6
CAUTION: When replacing the high-pressure fuel pump, it is very important to make sure that the tension
collar is present before reinstalling the pump. Failure to do so will result in excessive engine
noise and the subsequent failure of the high-pressure fuel pump and its cam lobes.
4. After performing the PCM reprogramming procedure, verify the repair by starting the engine and making
sure there are no MIL illumination or abnormal warning lights present.
NOTE:
If any DTCs should remain after performing DTC erase, diagnose the DTCs according to the
appropriate Troubleshooting section of the Workshop Manual.
After PCM reprogramming, it is no longer necessary to road test the vehicle to relearn KAM
(Keep Alive Memory).
5. Fill out an Authorized Modifications label (P/N 9999-95-AMDC-97) with the new PCM calibration information,
your dealer code, and todays date.
AUTHORIZED MODIFICATIONS
THESE MODIFICATIONS HAVE BEEN APPROVED, AS APPROPRIATE,
BY THE EPA AND CARB.
THE FOLLOWING MODIFICATIONS HAVE BEEN MADE:
1326c
Bulletin No: 01-022/08
2008 Mazda Motor of America, Inc.
Last Issued: 04/02/2008
Page 4 of 6
6. Place the Authorized Modifications label on the A pillar below the tear tag in the driver door jamb.
CALIBRATION INFORMATION
Mazdaspeed3 (52.2 or later software)
Mazdaspeed6 (51.9, 52.2 or later software)
Spec New PCM Calibration Part Number File Name
CA L39R-18-881D SW-L39RED000
Fed, Canada L39S-18-881D SW-L39SED000
Spec New PCM Calibration Part Number File Name
CA L38G-18-1881G SW-L38JEG000
Fed/Canada L38K-18-1881G SW-L38KEG000
1326d
AUTHORIZED MODIFICATIONS
THESE MODIFICATIONS HAVE BEEN APPROVED, AS APPROPRIATE,
BY THE EPA AND CARB.
THE FOLLOWING MODIFICATIONS H
