35 minutes ago, Stevey Y said:

Hi try any/all of previous suggestions but at that milage I would check the DPF loadings ash/soot as a blocked DPF could cause some of these problems does the car regenerate regularly.

Steve.

The cars dpf was gutted as I saw it had been welded and confirmed it by tapping it with a screwdriver and it made that hallow sound

24 minutes ago, christo098 said:

The cars dpf was gutted as I saw it had been welded and confirmed it by tapping it with a screwdriver and it made that hallow sound

Hi if the DPF is gutted its been remapped as well most likely, this is the source of the smoke and most probably the EGT sensors are well out of sync the whole system was designed around lowering gas temperature to eliminate Nox1 emissions so its a fine balance, I ran my car to three times your milage by addressing each problem as it cropped up and sticking to design as factory, its not a good system as standard but due to the complexity of the engine software tampering with said software long term is like throwing a time bomb into a dinner party, unfortunately you only have two choices revert what's been done and have the ECU taken back to standard program which won't be cheap, or sell the car as is, removal of the DPF core causes higher exhaust temps downstream and robs the turbo of the back pressure it requires to maintain boost pressure therefore promoting overrun, in short it causes the engine to become FUBAR.

Steve.

7 minutes ago, Stevey Y said:

Hi if the DPF is gutted its been remapped as well most likely, this is the source of the smoke and most probably the EGT sensors are well out of sync the whole system was designed around lowering gas temperature to eliminate Nox1 emissions so its a fine balance, I ran my car to three times your milage by addressing each problem as it cropped up and sticking to design as factory, its not a good system as standard but due to the complexity of the engine software tampering with said software long term is like throwing a time bomb into a dinner party, unfortunately you only have two choices revert what's been done and have the ECU taken back to standard program which won't be cheap, or sell the car as is, removal of the DPF core causes higher exhaust temps downstream and robs the turbo of the back pressure it requires to maintain boost pressure therefore promoting overrun, in short it causes the engine to become FUBAR.

Steve.

Ok thank you I will try get it back to standard

14 hours ago, christo098 said:

The cars dpf was gutted as I saw it had been welded and confirmed it by tapping it with a screwdriver and it made that hallow sound

At last the real cause of the problem has been revealed.