Some of the guys on mzspd3.com forums have said it made a big difference in power at high rpm, but I'm skeptical of that. Furthermore, we are at 5200+ feet altitude. Running a little leaner than sea level isn't a bad thing. I don't think I need the fuel pump replacement, but the reflash looks to apply.
If anyone has had this done I'd love to hear feedback.
<div class='quotetop'>QUOTE </div>
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 No: 01-022/08
Last Issued: 04/02/2008
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.
snip[/b]
Full TSB at this link:
http://www.o-m-g-w-t-f.com/stuff/Mazdaspee...919b%5B1%5D.pdf