Mazda CX-9 Grand Touring 2009 Manual page 1679

Fig. 51: Inspecting Atomization Pattern
Courtesy of MAZDA MOTORS CORP.
PRESSURE REGULATOR INSPECTION [MZI-3.7]
NOTE:
Due to the adoption of the mechanical returnless fuel system, the pressure
regulator cannot be inspected separately.
1. Perform "FUEL LINE PRESSURE INSPECTION". (See FUEL LINE PRESSURE INSPECTION
[MZI-3.7].)
2008 Mazda CX-9 Grand Touring
2008 ENGINE Fuel System (MZI-3.7) - Mazda CX-9