Shaking on idle

[Umar]

Hi guys im new on here so firstly Hi 🙋‍♂️ 

Ive bought an Audi A3 2.0TDi Black Edition a few days ago.

Its had the DPF removed & a re map done by the previous owner.

But on idle some times it’s smoking blue & shakes a little bit.

Is this smoke & shaking normal after the DPF & Re map...??

A few years back my Golf 170 did the same.

Cheers. 

[cliffcoggin]

Blue smoke is a sign of oil burning, usually because the rings/bores are worn. Does it smoke under hard acceleration?

Erratic idling may be part of the same problem if the engine is clapped out and has lost compression, or it may be unrelated.

[Umar]

Hi & thanks for the reply.

If the rings/ bore was worn wouldn’t it smoke all the time. ?

It only smokes now & then & some times it’s fine.

when I put foot down it does let a cloud of black smoke but that’s due to the EGR delete 

Cheers 

[cliffcoggin]

Not necessarily all the time, however smoking is always worse when the engine is working hard.

A dense cloud of black smoke is not the result of removing the EGR alone, something else is wrong. Perhaps the injectors, perhaps engine wear, perhaps the remapping, but whatever the cause its sounds as if it will fail an MOT because of the emissions so you need to resolve it.

My natural cynicism would make me suspicious of any engine that had been modified in the way yours has. I suggest you get it tested and hope the solution is not expensive.

[Umar]

Ok cheers mate I’ll get it looked at