Hey everyone new to this world, been in the diesel world for ever. I have a 2003 g35 coupe 6 speed and just cleaned the maf and tb and just reset the ecu,idle air and all that but ses came on and reset it again all good runs great but when I come to a stop and push the clutch in the motor revs up to about 1200-1300 rpms and then goes down to idle slowly never noticed this before is this norm or what can i do to fix it? also have a greedy axle back like the sound but looking to sell or trade would like a little more heavier tone ,also would like a cold air intake what do you suggest ?thanks. By the way im in Fl (central)