CX-7: Rough idle/stumbling TSB

Discussion in 'CX-7 & CX-9' started by dirtyd, Apr 21, 2008.

  1. dirtyd

    dirtyd New Member

    Found this on another website...

    http://www.mrlilguycdfps.com/random/4208HPFP_TSB.pdf

    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.
     

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