Post by
zureal »
https://forums.nicoclub.com/zureal-u279372.html
Tue Dec 12, 2017 7:23 pm
hey i got a r33 skyline gtst which is running rough at about 5k rpm and over when i full throttle, if i slowly press down on the throttle i can get to about 6k before it start to run rough again,it drives fine normaly has a little flat spot around 2500-3000 rpm but very minor, it has been tuned about a year and 3 months ago, but was taken of the road 3 months after the tune to repaint the car and put new forward facing inlet manifold on it, it was running good after the tune, i have recently check the timing on it and it is on 15 degrees and replaced and gapped new spark plugs, i have checked for vacuum leaks with some carby cleaner and found no change in revs.
the car has an old haltech ecu e11v2 with 3bar map sensor no afm, haltech wideband 02 sensor, garrett gt3582r turbo so turbo doesnt really spoil until like 3k rpm, has splitfire coil packs.
i bought the car already set up with the ecu and turbo and coils, but with blown pistons which i stripped and replaced with forged pistons and conrods and got everything checked and balanced then retuned, when i replaced the plugs recently they looked pretty fouled up so im leaning towards the coilpacks have shat themselfs, or mabye another electrical fault as the car did get some water into the engine bay as it was getting rubbed down for painting, the car is boosting but not enough to set of the screamer pipe which is set to 15 psi, anyone have any ideas on what my problem could be?
thanks