engine problems black smoke

[droppedaudia4]

my car is a 2005 2.0tdi a4 saloon 140bhp i was wondering if anyone knew a reason why my car has alot of black smoke when reving and is quite hard to start although i think the flywheels the reason why it is hard to start because it needs replacing.

 

[CL3RICx2]

Probably turbo seal's. Excesive oil in the exhaust getting burnt produces the black smoke.

Dont hold me to this, im just going off my past experience with turbo cars lol

 

[jwhat]

Could also be the re-map? Overfuelling.

 

[droppedaudia4]

Could also be the re-map? Overfuelling.

its not the remap as i took it out last week and it hasnt helped any i thought this at the start too though

 

[sparks]

Sounds like could be a fueling problem maybe sticky injectors possibly sticking open slightly more causeing more fuel being injected in which would then give you black smoke and hard to start especially from cold.

 

[MorkC68]

Most of the A4 TDi's do it!! I had exactly the same smoking problem (and still do), went to two seperate Audi Stealers with the problem - they all do it was the reply, we cant sort the issue. Apparantly it can be reduced with better quality oil such as Mobil but it doesnt get rid.

 

[Marc1]

To be honest I would post a video up if you can as one persons excessive smoke could be anothers perfectly normal. If it does show excessive I would suggest it's more over fueling which could be due to a lack of air controlled by the maf sensor. I'd see if there is a member local to you with vag com or take it to a specialist to ensure no codes come up. Equally it could just be bad fuel so you could also try running a bottle of forte diesel additive through the tank to se. If it makes a difference and make sure you are using decent diesel.

 

[Wrath]

I wonder if the particle filter in the exhaust has become damaged. My old Leon 1.9 150bhp used to spout shedloads of smoke out the backend but that was a Euro III engine so did not have the particle filter.

I haven't seen any black smoke from my B7 and I sometimes drive it a bit crazy

 

[jwhat]

Might you have a boost leak/ air escaping from a broken/old pipe etc.

I don't think the particle filter was fitted until the 170bhp versions were released.