New Problems

[askim98]

Originally Posted by markh29

yes pressure sensor was changed, the machine is now showing high back pressure on the dpf apparently, the dpf is brand new

really strange as it looks like then that the gas can go through the DPF but find it difficult to leave the DPF usually it is the opposite.

ask the people that have fitted the DPF to have a look, it is the best thing or the sensor is shot even if you just changed it.


askim98

[markh29]

Another new sensor was used to test and reading was still too high, the dpf manufacturer are claiming now that I must have a egr valve stuck open and it has filled the dpf in 2 days!
The Volvo specialist are saying there is no fault showing for erg. I'm not sure what will happen now

[Clan]

Originally Posted by markh29

yes pressure sensor was changed, the machine is now showing high back pressure on the dpf apparently, the dpf is brand new

Genuine volvo particle filter ? ???

[copperknob]

remove plastic cover from under egr valve when running you can press the arm in slightly and it shuld pulse against your fingers

[Clan]

Originally Posted by copperknob

remove plastic cover from under egr valve when running you can press the arm in slightly and it shuld pulse against your fingers

Mind you don't burn your fingers ;-)

[copperknob]

other way is to remove egr and check it also clean out 100%.is it drawing air somwhere to fill up in 2days is quick

[markh29]

Clan, it was an aftermarket filter from cats2u with a 2 year warranty

Im wondering if egr is a contributer because i get juddering in some gears on acceleration which corrects after i back off?
I still have the old dpf so that can be tested by the volvo specialist, is it easy to remove egr? on vadis it says lower engine 8cm??

Cheers

[Clan]

Originally Posted by markh29

Clan, it was an aftermarket filter from cats2u with a 2 year warranty

Im wondering if egr is a contributer because i get juddering in some gears on acceleration which corrects after i back off?
I still have the old dpf so that can be tested by the volvo specialist, is it easy to remove egr? on vadis it says lower engine 8cm??

Cheers

when you have these kind of problems with different people looking at it and giving different opinions and are unsure whether the original was faulty or not then you throw on cheap components which may or may not be to manufacturer specification you just compound your problems , and end up spending a lot more than if you took it to the dealer in the first place i have seen it many many times in my 40 year career .

If your old Particle filter was less than 75000 miles old it should still be servicable .

You dont have to lower the engine to get the EGR valve off ( assuming it is the 2.0 D engine ) but there is a 5 mm alen bolt on the underside which is best accesed with a very LONG socket extension from underneath .
you will get an EGR Fault code if it is sticking and not in the right position at all times , unless the valve head has broken off ! which seems to happen a lot in the Citröen versions of this engine but rarely on the volvo ones .
( volvo modified this valve around 2006-7 whilst Citröen carry on regardless having problems with it !)

[markh29]

Clan, i understand

The old filter is 85k or there abouts. I did not realise an aftermarket dpf could cause issues, i suppose i was lead by the 2 year warranty and the belief (due to the particulate restriction fault code) that it would be ok
I cant afford a volvo dpf, i suppose you could say i shouldnt have bought a volvo then but i wasnt aware of these issues before hand.
There is no EGR fault code, infact there is now no check engine message either, just the ash accumulation and 3 different sensors have read high pressure

[Clan]

Originally Posted by markh29

Clan, i understand

The old filter is 85k or there abouts. I did not realise an aftermarket dpf could cause issues, i suppose i was lead by the 2 year warranty and the belief (due to the particulate restriction fault code) that it would be ok
I cant afford a volvo dpf, i suppose you could say i shouldnt have bought a volvo then but i wasnt aware of these issues before hand.
There is no EGR fault code, infact there is now no check engine message either, just the ash accumulation and 3 different sensors have read high pressure

There must be too much resistance through that particle filter if the pressure differential is too high , can you read the pressure when the engine is running with a reader ? it should be 0 when engine off and around 3 - 20 hpa when idling . i would make use of that guarantee let the supplier sort it out .. or try and find a good used Particle filter .