Iuliu andrei

The smoke is back and is worst then before 

I have it for sell before the problems starts . Apparently no one wants it:)) 

I'm not that crazy:)) the last jobs I done to the car was to change the Dpf presure sensor  and I noticed that I don't have problem with the smoke. The smell still comes from exhaust but no smoke. From the last time when I disconnect the Battery I didn't have time for a proper run and now I'm stuck at 18 m/g  maybe that . Saturday I gone take a trip to Tring , will see then what.

On 25/03/2016 at 2:11 PM, smutts said:

Just a potential FIX for you bashing your head against this particular wall,

The problem, a 2008 is220d, 110k miles, with embarrassing quantities of white smoke from exhaust that smells of diesel fuel.

My parents car has been smoking like a pig for the last few months,

Diagnosis....
Garage condemmed the DPF and replaced it..................Still smokes.
Garage says "just keep driving it, the smoke will soon stop"............It didn't
Garage says "er, drive it some more"...................Still smokes.
Garage yanks the injectors and send them off to be tested, by people who are not idiots..................non idiots send them back with the verdict, injectors are perfect...........................Still smokes.
Garage now say they are sure it is the turbo which will need replacing...................At which point I get involved and rescue the car.

No sign of misfire, compressions good, no play on the supposedly fragged turbo, no headgasket doom.

Not trusting the fifth injector, I unclipped the fuel line and plugged it by clipping another injector on it.

Went for a drive, white smoke gone! So confirming fifth injector misbehaviour.

Changed the fifth injector, a total git of a job............Smokes, Argh!

So it is the ECU telling the fifth injector to keep on squirting.

Techstream turns up from ebay, so plug it in.

The dpf pressure values are all over the shop, so tee in a magnehelic guage, which disagrees with the values from the software.

Wiggle wiring, AHA! Gotcha! Pressure values in the software change in sympathy.

So I remade the wiring from dpf sensor to the ECU and then got good values for the dpf sensor pressure.

The ECU "learns" whilst you drive, but the corrupt dpf pressure data had totally confused it. Unplug car battery for ten minutes, reconnect, ECU starts to relearn with good data. Relearn the window winders by driving them for a couple of seconds against their stops at each door switch.

AND THE SMOKE STOPPED! and mpg has gone up from 25mpg imp to 40+mpg imp.

The magnehelic gauge reads 5kPa (20 inches water gauge) when regeneration of the DPF now starts.

So to recap, check the DPF pressure sensor to ECU wiring carefully before spending lots of money on the garage partswap goosechase.


Good luck on what is a fantastic car.

Warning!!!!!!!!!!!!

! I only disconnected the fith injector for long enough for diagnosis, if it is disabled for too long, the DPF will probably clog up! I only disconnected it for 20 miles.

You disconnected only the fuel line.What about the power supply?

 Yes I coded the injectors. I was at Lexus for diagnostic and they told me is the 5 th injector which is gone cost me 3500 to replace it an clean the carbon from the engine. 

Vsc light on   P0093 fuel sistem leak detected I changed the injector 2 and 3 problem fixed 

smoke now 

Dpf blocked changed in may 

5 th injector done 2 weeks ago

egr and Emission chamber cleaned 

lambda sensor done  

maf sensor is coming Monday 

the only thing I can do now is to see if the hoses emission  are blocked 

i love the car but is a pain in the ar.. I don't now what I can do anymore  

The lambda sensor? I ordered the maf and lambda sensor I gone change them today I hope is gone fix the problem with the smoke 

On 25/03/2016 at 2:11 PM, smutts said:

Just a potential FIX for you bashing your head against this particular wall,

The problem, a 2008 is220d, 110k miles, with embarrassing quantities of white smoke from exhaust that smells of diesel fuel.

My parents car has been smoking like a pig for the last few months,

Diagnosis....
Garage condemmed the DPF and replaced it..................Still smokes.
Garage says "just keep driving it, the smoke will soon stop"............It didn't
Garage says "er, drive it some more"...................Still smokes.
Garage yanks the injectors and send them off to be tested, by people who are not idiots..................non idiots send them back with the verdict, injectors are perfect...........................Still smokes.
Garage now say they are sure it is the turbo which will need replacing...................At which point I get involved and rescue the car.

No sign of misfire, compressions good, no play on the supposedly fragged turbo, no headgasket doom.

Not trusting the fifth injector, I unclipped the fuel line and plugged it by clipping another injector on it.

Went for a drive, white smoke gone! So confirming fifth injector misbehaviour.

Changed the fifth injector, a total git of a job............Smokes, Argh!

So it is the ECU telling the fifth injector to keep on squirting.

Techstream turns up from ebay, so plug it in.

The dpf pressure values are all over the shop, so tee in a magnehelic guage, which disagrees with the values from the software.

Wiggle wiring, AHA! Gotcha! Pressure values in the software change in sympathy.

So I remade the wiring from dpf sensor to the ECU and then got good values for the dpf sensor pressure.

The ECU "learns" whilst you drive, but the corrupt dpf pressure data had totally confused it. Unplug car battery for ten minutes, reconnect, ECU starts to relearn with good data. Relearn the window winders by driving them for a couple of seconds against their stops at each door switch.

AND THE SMOKE STOPPED! and mpg has gone up from 25mpg imp to 40+mpg imp.

The magnehelic gauge reads 5kPa (20 inches water gauge) when regeneration of the DPF now starts.

So to recap, check the DPF pressure sensor to ECU wiring carefully before spending lots of money on the garage partswap goosechase.


Good luck on what is a fantastic car.

Warning!!!!!!!!!!!!

! I only disconnected the fith injector for long enough for diagnosis, if it is disabled for too long, the DPF will probably clog up! I only disconnected it for 20 miles.

Can I leave the 5th injector in and disconnect the power supply? My injector is new and the Dpf  as well