TSB 01-022-08
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    
Vehicles:  2006-2007 Mazdaspeed6 vehicles    
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:
-  The drive current from the PCM is not enough for some fuel pumps.
-  Some fuel pumps have slower response.
PDF:  01-022-08-1919b.pdf