Fuel pressure!!
Thread Starter
Super Member
Joined: Mar 2010
Posts: 643
Likes: 72
From: London UK
2013 W204 C63 AMG, 2008 W221 S65 AMG
Fuel pressure!!
Hi all
Any ideas what the fuel pressure should be on the M275 65 AMG engine in a W221? WIS does not have this information anywhere (frustrating)
The M275 training document has it, it says 3.8 bar constant, and if it drops the fuel pressure, the control module increases voltage to the pump. I am taking this with a pinch of salt though, as I know other AMG's run a higher pressure (5 bar +)
Is this right?
Any ideas what the fuel pressure should be on the M275 65 AMG engine in a W221? WIS does not have this information anywhere (frustrating)
The M275 training document has it, it says 3.8 bar constant, and if it drops the fuel pressure, the control module increases voltage to the pump. I am taking this with a pinch of salt though, as I know other AMG's run a higher pressure (5 bar +)
Is this right?
Member
Joined: Jun 2005
Posts: 76
Likes: 7
From: Oslo, Norway
1998 C140 CL500
Fuel loop with pressure regulator (which maintains constant difference between intake and fuel pressure in rail), or like the M275, which delivers
3.8 regardless of pressure in intake (and no return to the tank from fuel rail)?
I do not know the answer, but from the M285 document, it seems that it also uses 3.8 bar.
br,
syljua
Newbie
Joined: Nov 2016
Posts: 5
Likes: 1
CL65 W215
Hi all
Any ideas what the fuel pressure should be on the M275 65 AMG engine in a W221? WIS does not have this information anywhere (frustrating)
The M275 training document has it, it says 3.8 bar constant, and if it drops the fuel pressure, the control module increases voltage to the pump. I am taking this with a pinch of salt though, as I know other AMG's run a higher pressure (5 bar +)
Is this right?
Any ideas what the fuel pressure should be on the M275 65 AMG engine in a W221? WIS does not have this information anywhere (frustrating)
The M275 training document has it, it says 3.8 bar constant, and if it drops the fuel pressure, the control module increases voltage to the pump. I am taking this with a pinch of salt though, as I know other AMG's run a higher pressure (5 bar +)
Is this right?
Thread Starter
Super Member
Joined: Mar 2010
Posts: 643
Likes: 72
From: London UK
2013 W204 C63 AMG, 2008 W221 S65 AMG
I measured mine at 75psi at idle. 221 has a slightly different fuel pressure regulator design but I belive its probably set at 5 bar.
