Engine: D52447: - Vacuum Assisted Engine Mounts & Vacuum System Test

Shadeyman · May 17th, 2013, 13:29

I've had the "ENGINE SERVICE REQUIRED" pop up on the display twice now so I decided to investigate a bit further. Using some software called TouchScan on my laptop and a Bluetooth ELM327 interface I read the error code, P0244- Wastegate control solenoid valve malfunction (Over Boost) was stored.

Searched the internet and found a few videos relating to the XC90's vacuum system by outnumbered(mike) on YouTube and decided to have a closer look.

I brought a Sealey VSE952 Vacuum Gauge and connected it to the vacuum system where the red arrow is pointing in the diagram.

This was the result at tickover 2 weeks ago.
http://s296.photobucket.com/user/Sha...b4ad1.mp4.html

This was the result at tickover today with the engine mounts disconnected, a good vacuum reading I think.
http://s296.photobucket.com/user/Sha...f92e1.mp4.html

I then reconnected the engine mounts and got this. By pinching the pipe to the rear engine mount I could make the reading increase.
http://s296.photobucket.com/user/Sha...f0f80.mp4.html

My conclusion:
Either the engine mount or the pipe feeding it has a leak and this is why I've had the "ENGINE SERVICE REQUIRED" pop up and a loss of power.

Can someone confirm I'm right before I order a new rear engine mount and some pipe?

May 17th, 2013, 13:29	#1
Shadeyman VOC Member Last Online: May 28th, 2020 23:57 Join Date: Jun 2012 Location: Wolverhampton	Vacuum Assisted Engine Mounts & Vacuum System Test I've had the "ENGINE SERVICE REQUIRED" pop up on the display twice now so I decided to investigate a bit further. Using some software called TouchScan on my laptop and a Bluetooth ELM327 interface I read the error code, P0244- Wastegate control solenoid valve malfunction (Over Boost) was stored. Searched the internet and found a few videos relating to the XC90's vacuum system by outnumbered(mike) on YouTube and decided to have a closer look. I brought a Sealey VSE952 Vacuum Gauge and connected it to the vacuum system where the red arrow is pointing in the diagram. This was the result at tickover 2 weeks ago. http://s296.photobucket.com/user/Sha...b4ad1.mp4.html This was the result at tickover today with the engine mounts disconnected, a good vacuum reading I think. http://s296.photobucket.com/user/Sha...f92e1.mp4.html I then reconnected the engine mounts and got this. By pinching the pipe to the rear engine mount I could make the reading increase. http://s296.photobucket.com/user/Sha...f0f80.mp4.html My conclusion: Either the engine mount or the pipe feeding it has a leak and this is why I've had the "ENGINE SERVICE REQUIRED" pop up and a loss of power. Can someone confirm I'm right before I order a new rear engine mount and some pipe? Last edited by Shadeyman; May 17th, 2013 at 13:32.

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