I rekon its the homeless as well.

Wait till they start rattling their coin collecting tin inside your engine.

You need an old priest and a young priest. Oh and some holy water!!!

Must be Friday........

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"You can turn your back on a person, but, never turn your back on a drug. Especially when it's waving a razor-sharp hunting knife in your eye." - Raoul Duke

it doesn't only happen in the morning. It's even when the car's warmed up but the majority of the time when cold. It's as if the learning ECU is confused by the cat back/giving the car a bit more fuel and then pissing the excess out when i start my car back up.
and i think diff but i've had the rear replaced by subaru and it seams to be the centre diff now.... but then again thats what i thought when the rear went....ha

and um, yeh no for the boost leak. i know wat a boost leak is buddy

i guess i'll just get subaru onto it and adding to their warranty bill for my car hahahahahaha

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S14 Series II
Bolt Ons
Power FC

263 hub hp

If it was overfueling the exhaust should be blacker, not white rich = more carbon and you should have a lot of black on the back of the car. Like I said, how old is the cat back? Also if it is new there could be contaminants burning off from joints. I had my ECU (V3 Sti) take over 3 weeks to adjust itself to a different 3" TBE, it had a fairly basic 3" on before this with the same config cat/centre reson/rear muffler...their fussy!

I take it when you say re-learning you're getting some hunting at idle?