Hey guys,
my first post here on the forum, but have been reading a lot over the past 6 months..
recently purchased a 32 gtr, 125k on the clock. Pretty much stock except for a 3.5" cat back.
when I first purchased the car, it naturally blew a small amount of black smoke on boost, back fires regularly on engine breaking etc.. what you'd expect. I've recently noticed its blowing a lot more black smoke, back fires about the same amount. I think it might be running rich? I know the previous owner used 95, I always use 98, not sure if this is contributing to the problem.
Before I purchased the car, I checked the oil.. he had recently changed it as it was still quite golden. Its now done about 3000k and is a little black, could this be related in anyway? I'll be changing the oil out this weekend with some 300v.
If anyone is able to shed some light on how I might go about diagnosing/fixing this, that would be appreciated.. and if its not even a problem, let us know..
Cheers