HELP
Newbie
Joined: Aug 2015
Posts: 6
Likes: 0
Bluetec
Is he using a real scan tool, not a code reader?
With a proper scan tool, an experienced tech can interpret the appropriate values. to see whats going.
How are you monitoring the fuel pump control units (left and right). You replaced both fuel pumps?
How do you know your fuel gauge is accurate, is there actual fuel in the tank? Did he measure fuel rail psi with a gauge at key on and during cranking?
Throwing parts at these cars gets expensive fast.
Its hard to diagnose a concern over the internet, if I had the vehicle at my shop, would be much easier.
In and out.............
I'm sorry I'm no help
Good luck
With a proper scan tool, an experienced tech can interpret the appropriate values. to see whats going.
How are you monitoring the fuel pump control units (left and right). You replaced both fuel pumps?
How do you know your fuel gauge is accurate, is there actual fuel in the tank? Did he measure fuel rail psi with a gauge at key on and during cranking?
Throwing parts at these cars gets expensive fast.
Its hard to diagnose a concern over the internet, if I had the vehicle at my shop, would be much easier.
In and out.............
I'm sorry I'm no help
Good luck
Thread Starter
Newbie
Joined: Feb 2018
Posts: 3
Likes: 0
06 CLS 500
I know I wish I could bring it to you but yes it has fuel in the tank and I only changed the main fuel pump I didn’t change the sending fuel pump I changed the driver side I have the passenger fuel pump also
MBWorld Fanatic!
Joined: Aug 2015
Posts: 1,059
Likes: 73
From: DC Metro Area
2007 Mercedes E550
Did you check the fuel pressure on the schrader valve on the rail?
It is kind of hard to believe that you do not have any codes present!
You might check to see if the fuel relay and or fuses are working properly.
