Exhaust Problem?

[Scratch]

I have a R32 GTR (93 edition), just purchased it, stock standard running a whole 5psi of standard boost (chuckle). Got two HKS Superpower flow air filters and a thrust catback exhaust on it as well. Fairly stock car, RAWS complianced.

when the vehicle is running idle, the smell exhaust fumes is nearly overwhelming. There is no smoke coming out fo the exhaust or anything, just a lot of exhaust-smell-type-fumes (bear with me as i work through the terminology). I can smell it inside the car when driving as well; not really bad, but still there. when walking around the car on idle i can smell it around the engine bay area as well. when I rev the engine on idle, there is no smoke. However when I rev it hard (around 4000+ RPM) on idle, i see black carbon like smoke coming out of the exhaust (not blue or white smoke). Dont see anything when driving, nothing obvious enough anyway. Does anyone have any ideas what could be causing this?

[Kozeyekan]

I have a R32 GTR (93 edition), just purchased it, stock standard running a whole 5psi of standard boost (chuckle). Got two HKS Superpower flow air filters and a thrust catback exhaust on it as well. Fairly stock car, RAWS complianced.

when the vehicle is running idle, the smell exhaust fumes is nearly overwhelming. There is no smoke coming out fo the exhaust or anything, just a lot of exhaust-smell-type-fumes (bear with me as i work through the terminology). I can smell it inside the car when driving as well; not really bad, but still there. when walking around the car on idle i can smell it around the engine bay area as well. when I rev the engine on idle, there is no smoke. However when I rev it hard (around 4000+ RPM) on idle, i see black carbon like smoke coming out of the exhaust (not blue or white smoke). Dont see anything when driving, nothing obvious enough anyway. Does anyone have any ideas what could be causing this?

check under the hood while the engine is revving. The gasket from the front or dump pipe might be toast, and leaking exhaust there.

[mad082]

is the exhaust new, or has it been on the car for a while now? if it is new, then it will just be the smell of it 'burning in'. it will go away after a week or 2 (depending on how much you drive it).

[Godzilla32]

Its all speculation really but have you checked the cat it maybe either emptied out or not there at all. Doubtful though if you just got the car from a ruputable place as they wouldnt allow it to be registered like that.

[Scratch]

thx for the tips kozeyeken, Mad082 and Godzilla32.

I'll definately get the gaskets checked as koze mentioned, i had a feeling that was it as well. the exhaust is from japan with the car, from what i can see it is well covered in carbon build up so its been there for a while. I didnt think about the cat converter, my reason was the same; they wouldnt have it complied with a dodgy cat. Having said that, many dealer swap gear when they comply cars anyway, so i'll have to get the thing up in a hoist..

Overall I'm beginning to think i'm running rich and the car needs a tune up. But i'm not sure if running rich will cause an increase in exhaust-carbon-monoxide-type fumes. i'm under the impression that you usually smell fuel if its running rich... is this not the case?

[mad082]

the car would've been complied with a different exhaust as to the one that is on there. the car has to be stock when complied. most import places have a spare standard exhaust that they bolt on when they take it to be complied, then bolt the one that came with it back on when they get back.