Excess Exhaust emission's

[rondeauteller]

I have just successfully replaced the throttle body on my w204 c220 saloon which as extinguished the engine management light on my instrument panel.
However, i now have another problem. As a result of replacing the throttle body my vehicle is now emitting large plumes of excess smoke via the exhaust system when cold. As soon as the engine gets up to temp the smoke disappears. I have tried turning the ignition on to position two and leaving it for 20 mins to see if the vehicle electronics would solve this issue but without success.
Any comments as to how i can solve this issue would be greatly received.

 

[mattkh]

Where did you get the new throttle from ?

 

[Steve@Avantgarde]

A tin or 2 of cataclean, some premium diesel and a good Italian de-coke should sort it out.

 

[John Laidlaw]

Leaving it idling won't help.....

 

[robin.large]

Try throttle reset?
Ignition on to position 2 do not start engine
Press throttle to floor for at least 10 seconds
Keep foot down and switch ignition off
Then release pedal.
Wait a couple of minutes
Start up and see if any change?

Sent from my ONEPLUS A5010 using Tapatalk

 

[rondeauteller]

Where did you get the new throttle from ?

The throttle body was purchased from a Mercedes main dealership.

 

[rondeauteller]

Try throttle reset?
Ignition on to position 2 do not start engine
Press throttle to floor for at least 10 seconds
Keep foot down and switch ignition off
Then release pedal.
Wait a couple of minutes
Start up and see if any change?

Sent from my ONEPLUS A5010 using Tapatalk

Thanks for your reply, I'll give it a try.

 

[LostKiwi]

Try throttle reset?
Ignition on to position 2 do not start engine
Press throttle to floor for at least 10 seconds
Keep foot down and switch ignition off
Then release pedal.
Wait a couple of minutes
Start up and see if any change?

Sent from my ONEPLUS A5010 using Tapatalk

Old wives tale.
Does absolutely nothing.
You see this suggested on every car forum for every brand which would suggest every manufacturer uses the same programming and components manufacturer (which they don't).

 

[M80]

It cost me nowt to try,
it also did nowt.

 

[ajlsl600]

Sorrio.I reckon efforts to get phones,laptops,car electronics to behave as designed takes up significant amount of our time,and takes a good bite out of our wallets .

 

[mattkh]

Did you play around with the butterfly in the throttle body when you were installing it ?
I cant see it in pictures I have seen on the net, but do you remember how many wires were there on the electrical plug connecting to the throttle ?

 

[rondeauteller]

I have just successfully replaced the throttle body on my w204 c220 saloon which as extinguished the engine management light on my instrument panel.
However, i now have another problem. As a result of replacing the throttle body my vehicle is now emitting large plumes of excess smoke via the exhaust system when cold. As soon as the engine gets up to temp the smoke disappears. I have tried turning the ignition on to position two and leaving it for 20 mins to see if the vehicle electronics would solve this issue but without success.
Any comments as to how i can solve this issue would be greatly received.

After a lot of investigation i have now found out the issue with my W204 which is emitting excess smoke from the exhaust. It has nothing to do with the throttle body that i fitted.
It is actually a fault with the fuel injectors on this model that Mercedes have known about for quite some time. The injectors have a design fault and Mercedes have withdrawn them. It was only when i was trying to get a replacement set of injectors that i discovered this issue with my W204.
Mercedes have agreed to fit a replacement set which includes a new injectors, new piping and a new ECU. A grand total of £3,500 which Mercedes have agreed to cover. Result, i thought i would update this post in case anyone else has the same issue with the same model.

 

[mioba]

result

 

[mattkh]

Thanks for the update.
Interesting that a throttle body affected the injectors.