Engine: D52447: - new engine

floors · Apr 11th, 2011, 09:49

Hi All
I have just fitted a d5 engine (out of a running but written off s80) to my XC90. I have it all fitted but can not start it i have code read the car and is saying common rail fuel preasure is low what should i do next to try to correct this. After all the work this and last sunday i hoped to get in and start it . I need some expert help!!!!
MANY THANKS

hancym · Apr 11th, 2011, 14:57

Check for leak-back on the fuel injectors the cheapest and easier thing to do first. If one or more of the injectors cannot hold pressure then the rail will not be able to maintain the pressure required to start or run.

I'm not over familiar with the Volvo set-up but drawing from all the problems I had with my Chrysler diesel engine you may need to bleed the system and if the pump is not capable of lifting there may be a lift pump taking the fuel from the tank to the high pressure pump. Also check all the filters if you haven't already and the high pressure pump may also have a proportioning valve or variable fuel pressure valve designed to release excess fuel back to the tank; this may be failing or the seals may be leaking. These are some of the problems I had with the BOSCH pump on my Chrysler.

Remeber, everything with diesel is a bit more problematic than petrol in my opinion; you are dealing with fuel pressures that are greater than the pressure at the depth the Titanic is at!

spokoluzik · Apr 12th, 2011, 23:29

have you got any error codes???

Apr 11th, 2011, 09:49	#1
floors New Member Last Online: Oct 16th, 2011 14:15 Join Date: Apr 2011 Location: romford essex	new engine Hi All I have just fitted a d5 engine (out of a running but written off s80) to my XC90. I have it all fitted but can not start it i have code read the car and is saying common rail fuel preasure is low what should i do next to try to correct this. After all the work this and last sunday i hoped to get in and start it . I need some expert help!!!! MANY THANKS

Apr 11th, 2011, 14:57	#2
hancym Master Member Last Online: Feb 25th, 2024 15:40 Join Date: Jan 2011 Location: Norwich	Check for leak-back on the fuel injectors the cheapest and easier thing to do first. If one or more of the injectors cannot hold pressure then the rail will not be able to maintain the pressure required to start or run. I'm not over familiar with the Volvo set-up but drawing from all the problems I had with my Chrysler diesel engine you may need to bleed the system and if the pump is not capable of lifting there may be a lift pump taking the fuel from the tank to the high pressure pump. Also check all the filters if you haven't already and the high pressure pump may also have a proportioning valve or variable fuel pressure valve designed to release excess fuel back to the tank; this may be failing or the seals may be leaking. These are some of the problems I had with the BOSCH pump on my Chrysler. Remeber, everything with diesel is a bit more problematic than petrol in my opinion; you are dealing with fuel pressures that are greater than the pressure at the depth the Titanic is at! Last edited by hancym; Apr 11th, 2011 at 15:04.

Apr 12th, 2011, 23:29	#3
spokoluzik Trader Last Online: Dec 6th, 2023 19:46 Join Date: Jun 2010 Location: london	have you got any error codes??? __________________ http://volvodiagnostic.com/

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