sohcslammer
Senior Member
So I bought a 99 SI yesterday, it's super clean, 4 wheel drilled and slotted brakes, bronze rotas, Ground Controls, and a CAI, otherwise it's stock. So yesterday when I was driving it around I got on it and when VTEC kicked in a pretty big black cloud shot out the back. I haven't been able to romp on it any more to check it out but I was wondering a few things....
#1) Since the car was a one owner car and I KNOW the GIRL drove it really nice, could it just be that she hasn't hit VTEC lately and that it's just blowing out carbon?
#2) If it was a head gasket wouldn't it blow out black smoke all the time?
#3) Could the cat be involved at all? It throws a CEL for the cat sometimes.
#4) What are possible reasons for black smoke?
I didn't actually see the smoke myself, my buddy was driving behind me so I don't know how much it was, or how black it was. This weekend I am replacing the whole exhaust system from the header (exhaust manifold) back. Possible fix? After re-reading this post I realized how much I hate posts like this because no-one will know for sure, but maybe someone has some guesses????
Thanx guys. B)
#1) Since the car was a one owner car and I KNOW the GIRL drove it really nice, could it just be that she hasn't hit VTEC lately and that it's just blowing out carbon?
#2) If it was a head gasket wouldn't it blow out black smoke all the time?
#3) Could the cat be involved at all? It throws a CEL for the cat sometimes.
#4) What are possible reasons for black smoke?
I didn't actually see the smoke myself, my buddy was driving behind me so I don't know how much it was, or how black it was. This weekend I am replacing the whole exhaust system from the header (exhaust manifold) back. Possible fix? After re-reading this post I realized how much I hate posts like this because no-one will know for sure, but maybe someone has some guesses????
Thanx guys. B)