2.5 Diesel lack of Power

Put it on diagnostics. I am sure there will be a few codes to sort out.

when did you last change the diesel filter?

Last changed the filter over a year ago but will change it now as well ... is there a filter in the tank ... my friend had an older model and said he took his out and put an inline filter in futher along the line ??

slightlyriskyneil said:

Last changed the filter over a year ago but will change it now as well ... is there a filter in the tank ... my friend had an older model and said he took his out and put an inline filter in futher along the line ??

Click to expand...

there is a fine gauze on the inlet to the lift pump in the fuel tank, that can also get clogged up, though it's a bastard of a job to do as you have to drop the fuel tank to get to it, or as we did in the end, cut an access hole in the floor under the rear seats. We have a '95 2.5 DSE.

Pipe from the inlet manifold to the MAP sensor split is another possibility.

It could possibly be the MAS (Mass Airflow Sensor).

Being a 2000 model you'll have the EGR & MAS Sensor. When this plays up it usually shows up as lack of power/pull. I had this on my 1999 2.5 DSE and bought a cheap Ebay replacement which proved no good. I ended up buying a genuine replacement part from Paul at airmassmeters.com www.airmassmeters.com for £164.98 inc pp & vat.

To test if it is faulty - unplug it. The ecu will default to set values and the car will pull better, but will need a new one fitting.

Intercooler hoses delaminated internally, gummed up intercooler ?

bigsmellydaddy said:

Intercooler hoses delaminated internally, gummed up intercooler ?

Click to expand...

Hey wallingford, my old place of residence!!

to add to this, check the pipe from turbo to boost sensor, found them split and gummed up wth sticky oil residue, boost sensor also helps if you clen the inlet to it, if the engine dont know how much boost it needs it wont get it!!

on the maf, these often do not show a fault code as they can be duff or only partially working,when partially working it wont show a code!

Datatek said:

Pipe from the inlet manifold to the MAP sensor split is another possibility.

Click to expand...

rangerovertoy said:

Hey wallingford, my old place of residence!!

to add to this, check the pipe from turbo to boost sensor, found them split and gummed up wth sticky oil residue, boost sensor also helps if you clen the inlet to it, if the engine dont know how much boost it needs it wont get it!!

on the maf, these often do not show a fault code as they can be duff or only partially working,when partially working it wont show a code!

Click to expand...

Is what he said !!

Also boost isn't controlled (it is not a variable boost turbo - just limited to 15psi or something!), so it is not a case of how much boost the engine needs, but how much fuel is needed due to boost pressure (I think)

50 mph uphill whilst towing, sounds like you've got a goodun to me Sorry just an old petrol head having a cheap laugh!!

Saint.V8 said:

Is what he said !!

Also boost isn't controlled (it is not a variable boost turbo - just limited to 15psi or something!), so it is not a case of how much boost the engine needs, but how much fuel is needed due to boost pressure (I think)

Click to expand...

Correct you are getting gooderer and gooderer.

wammers said:

Correct you are getting gooderer and gooderer.

Click to expand...

Learning from the best Tony...

thanks you all - I will work through your advice and update when able ... cheers