a4 black smoke

[nickcon16]

a4 tdi lots of black smoke when driving at low speeds around town, have have put on new maf no better when maf disconnected no more black smoke.

[mcgowan.b]

Could be the head gasget faulty. Has the engine been overfilled with oil previously?

[tdi miki]

What is the engine code?

[adamss24]

The new MAF is genuine ? Aftermarket ones are notoriously *****...

[andysuth]

I took the EGR valve off mine and cleaned it, bottom bolt is a stinker to remove but once off I saw the whole thing was gummed up with "Tar".

Cleaned by mechanical means and soaked in parafin several times (not the diaphragm though!).

Car has a lot less smoke when the turbo kicks in (2k +).

Might be worth giving a go if your MAF is ok. You'll need a 6mm allen key and maybe a 12mm socket, depending on whether you can get that bottom bolt out.

-AS

[nickcon16]

thanks guys took pipe off edg washed old maf out and put back on much better no more black smoke went well for a few days but every now and again seems to lose power so could be maf or maybe edg needs to be took off and washed out eg. when i took off pipe connected to edg there was a lot of soot in it

[nickcon16]

[quote=nickcon16;88867]thanks guys took pipe off edg washed old maf out and put back on much better no more black smoke went well for a few days but every now and again seems to lose power so could be maf or maybe edg needs to be took off and washed out eg. when i took off pipe connected to edg there was a lot of soot in it