Black Dust On Ass = Rich Mixture?

[Stagea_Neo]

I had this issue with my r31, for me it ended up being fuel pressure regulator running full pressure all the time, 300kpa i think the mechanic said. replaced it and all ok.

So as soon as i went to accelerate I'd get a massive amount of fuel dumped in the cylinders, flooding

and black smoke, the only way i could drive it for a few weeks was feathering at 1/4 - 1/2 throttle like

a grandma and it went ok.

Edited May 29, 2008 by Stagea_Neo

[ClutchBurndout-:(]

.....

[Swink33]

As Mav was saying, its just part of owning a skyline. All my skylines have had it. Its seems to get worse the more modified the car is. I would say it mostly depends on how rich the mixtures are.