After it was pointed out to me last night that my car really reeks after its "ECU UPDATE ;)", i began to wonder has this effected anyones exhaust emissions, failing an MOT?

Cheers.

Nah wont fail an MOT, even with Decat

My old 306 used to pump out the soot after a heavy map and decat, was a laugh

I will agree its good looking behind you and leaving a Corsa or VTEC in a ploom of smoke.

Cheers for that.

Too much smoke usually means a bad map? where'd you get yours? My Mapped RS is whistle clean...

Too much smoke usually means a bad map? where'd you get yours? My Mapped RS is whistle clean...

No, no its good.

Trust me!

Just maby a bit too much fuel, but screw it not bad for a few hundered notes.