My '95 gtst r33 just started playing up,it splutters/loses power and is blowing a lot of black smoke at higher revs/speed in any gear
changed the plugs & pod filter,cleaned airflow meter but no luck
only mods are pod-intercooler-3" turbo back zorst [with stock cat atm] -plumb back bov-Mines ECU tuned for 10 pounds
any advice will be appreciated as i havent had time to take it to a mechanic