Hey guys, I've got an 96 R33 S2 with an RB25DE NEO in it.
The problem I have is it is running super rich, just above my exhaust on my bumper is black like solid black & I'm getting shit fuel economy. When I drive I can just smell fuel & the same when standing outside the car. I know Skylines aren't cars for fuel economy but it's N/A and I'm getting roughly 320kms to a tank. A mate of mine has a 96 S2 R33 GTS-T and he said he gets 350-400kms flogging it! I know it has a lot to do with the driver & the way I'm driving but I don't believe I give it to it a lot, of course every now & then, I change gears around 3k RPM.. For modifications I only have an X-force rear muffler, pod filter & super spark coil packs. I've just had the correct harness & ECU installed as it was running a GTST computer & R33 harness with the plugs replaced to suit the NEO from the old engine, performance wise it's so much better but fuel economy stays the same?
Sorry if I'm a bit oblivious guys bare with me, I'm a newbie to Skylines. Always been a fan it's just my first time owning one.
Any help on suggestions to diagnose the problem or things that may help improve it are appreciated!
Cheers,
Jordan.