Porsche Workshop Service and Repair Manuals

Fuel Pressure: Specifications

Fuel Pressure Specifications 

Control pressure "cold" (equals outside temp.)

Diagram for warm-up regulator Part No.911.606.105.08  Bosch No.0438.140.090

Control pressure "warm"  ............................................................................................................................................................................  3.4 to 3.8 bar 

System pressure 

Testing value ...........................................................................................................................................................  4.5 to 5.2 bar 
Adjusting value .......................................................................................................................................................  4.7 to 4.9 bar 

Leak Test

Min. press.  after 10 min. ................................................................................................................................................................................  1.3 bar 

after 20 min. ................................................................................................................................................................................  1.1 bar 

Fuel Injectors Opening pressure .................................................................................................................................................................  2.5 to 3.6 bar