Lacking Power

[Roger1]

My turbo diesal estate lacks power going up hills ( embarrassing). Another member suggested checking for a failed turbo on his question. What does the turbo look like and were is it situated in the engine compartment? It might be worth checking.

[wozza]

It should be situated at the end of the exhaust manifold. Not always the case but in your vehicle it should be.

 

And they look somewhat like this.

 

http://www.diy-nitrous.fsnet.co.uk/images/car-turbo.jpg

[Roger1]

It should be situated at the end of the exhaust manifold. Not always the case but in your vehicle it should be.

 

And they look somewhat like this.

 

http://www.diy-nitrous.fsnet.co.uk/images/car-turbo.jpg

 

 

Thanks wozza,

 

I will have a look and see if I can spot it.

 

Roger1

[Randombloke]

I would be inclined to check that there are no leaks in the pipe that feeds turbo over pressure to the diesel pump, or if your car is more modern that that, that the manifold absolute pressure sensor is connected and working.

 

With XUD 406s of which I have one (very similar to Xantia engine wise), it's gutless with the plug to the MAP sensor disconnected.

 

Please can you let us know if your Xantia is a 1.9 XUD engine or the 2.0 HDi. Failed turbos tend to make a bit of a racket unless they are totally seized IMO.

[DickieG]

Two areas I've discovered that have caused a lack of power under similar circumstaces are firstly a build up of sludge/bacteria around the filter on the fuel pick up in the fuel tank restricting the flow of diesel.

 

To gain access, lift up the base of the O/S rear seat, pull out the rubber bung, unclip the pipes and turn to locking ring (might need a gentle tap to break the seal) and lift the assembly out of the tank.

 

The second issue was the air intake pipe under the air filter collapsing, resticting air rather than fuel this time!

 

If your car is a XUD rather than HDi, are there any problems staring the car first thing in the morning? If there are then that would indicate a leak on a fuel pipe generally within the engine bay, the problem with such leaks is that as the fuel line is under suction rather than forced pressure, air is sucked in but rarely does fuel leak out making tracing the fault rather difficult.