I changed the cat out for a decat pipe on my 300 tdi today, the car seems amazingly easier to drive now, revs stay up well when changing gear, tickover is a lot better, engine sounds better all round, and at low speeds it's better, also sounds like the turbo is breathing better too, i also fitted an egr blank kit with bypass pipe a couple of weeks ago.

The thing is, when i first gave it some hard throttle, a great plume of black sooty smoke belched out, this continued when the throttle was dapped untill it had warmed right up to what i call normal, this doesn't seem as bad when warm, i get a bit of a puff when it's warm still, could this be ok, to do this when accelerating, and under load ? or is this going to manifest itself into something bigger.

I searched the threads for similar posts, and a few people have commented on this, the engine seems so much more responsive now, and it would be great if i could leave the decat pipe on as it's made alot of difference ?


cheers

Rod

When you did the EGR blank did you clean the intercooler and inlet manifold out-they might be gunked up restricting air flow-presumably air filter is good and all air pipes

that could well be the problem, all i did was clean what i could see in the intercooler connection pipe, yeas it has a new filter just fitted