I FINALLY got the built ka-t to run and be drivable but I have noticed something really weird that I can't explain. when I first turn the car on my afr's are lean(15.5-16, should be around 14.5-15) and after driving around and warming up it goes super rich like 11-12 AND when I am just cruising(just holding a speed/rpm)it randomly starts to sputter and become pig rich, when this happens if I try to giv'er it starts going and then again it just starts hesitating/making a popping sound(sounded like spark blowout) and the bov(synapse bov) sounded like it wasn't working(could hear the turbo spin backwards).
I thought it was a boost leak at bov so decided to mess with that and the first thing I did was try to run the bov without recirculating it(i know nothing to do with boost leak but ya...). the car idles fine without it AND under WOT I do not have any sort of hesitation or spark blow out type symptoms but it runs pig rich(the wideband starts at 10 and anything below is rich) and I cant get the car to idle after driving it a bit.
SO does anyone have any ideas what it could be? I know the richness after the bov vents to atmosphere is because it's not getting the air put back into the system but why can I NOT get it to idle?
the setup is:
built kade-t(ross8.6 pistons, eagle rods, stock head)
precision 6031e t3/t4 .63 a/r
650cc injectors
z32 maf
walboro pump
safc2(set 2in 2out)
ecu tuned for z32/650cc
