over the past year this forum has helped me along with my build. i finally drove the si yesterday.

2000 Si b16a2
ctr cams
ctr pistons
aem cai
maxbore tb
blox im
rc 310s
b&m fpr
port/polish b16 head/itr valvetrain
dc 4:1 2.5
2.5 cat for a v8
2.5 midpipe
2.5 vibrant muffler
plx devices wideband/guage

Right now I'm using a jdm p30 basemap with everything except the o2 disabled, and i'm in debug mode. that seems to be the only way i can run w/o a CEL. i also adjusted the fuel injectors. i have tried playing with the pressue. right now its running at 33psi and it's rich as hell. not sure what to do. i dont want to lower the pressure any more but it doesnt make sens to me that its rich with such low pressure. any thoughts? i was wondering if i should put the stock injectors back in and leave the fuel settings stock...

this leads to my next issue - i cant really set the timing or fuel pressure until i get my idle right. the ecu is set at 750 but at times it surges between 1200 and 1500. how can i get the motor to idle accordingly? when i adjust the throttle screw it seems to get richer or a higher idle. also what is a stock fuel pressure for a b16b?

 

i played with the fuel maps that mtber sent and bumped up the fpr to 37 or so and i advanced the timing a tick. i took it for a drive. it felt the strongest yet after many different crome maps and fpr adjustments. the afr guage stayed in the mid 13's. i mostly drove in the 2900-4500 range with a few spurts to 5000.

my concern now is why on deceleration with zero throttle, the afr goes all the way lean to 19.9 on my guage. it makes kind of a popping rumble unless i lightly hold the throttle open and keep the a/f at around 15 while decelerating. is that bad that it goes fully lean on decel? is there a way to have the ecu apply some gas while decelerating to keep it from going lean or is this normal?

 

stock maps do the same thing, cuts fuel when your off the throttle.

 

Yeah thats a good thing, zero load = zero fuel required. So they shut off whenever you take off the throttle in deceleration.

 

swap back to the stock injectors for break-in, if you're not revving it high and demanding that it makes more power; bigger injectors with stock fuel pressure on the stock map will run you rich, and you'll risk washing out the bores such that your rings won't properly seat.