Well, this is what I would recommend. Do you have Hondata?
1) Gap your spark plugs to about .33 pr
.30 ... you can buy a spark plug gapping tool for 5 bucks at autozone or consumer auto parts.
This really helps !!!!
2) If you have hondata, what value is your map sensor displaying? does it match the boost gauge?
3) In hondata, set your table to view the fuel adjustment, make sure you are not too lean or too rich. If you have a wide band, this will be no issue for you.
4) Check boost cut safety, set it to 11 PSI on first option, cold boost and hot boost, see if it goes passed 4k.
5)What is your fuel PSI ? You have a psi fuel gauge ?
6) your spark plugs, cables, distributor cap and rotor good?
7) What is your rev limiter set to? Also, disable launch control until you resolve this.
8) Were you able to idle smooth? If not, get the car to idle smooth first, see the percentage you went up in fuel from where you started, then start where you started, and up the entire fuel table at the same percentage to get a starting point.
9) In the advanced closed loop, did you set the Voltage / input values? Are you using pin d10? d14? If d10, did you need to cut any resistors in your ecu version?
10) Upload your basemap here! So we can load it into our s300 and take a look. Do you need a base map? I have one for you.
.... It could be many things, its true it could be your map sensor, thats why if you have hondata, you can diagnose it.
Make sure you gap your plugs, it's a must. and it will take you 10 to 15 minutes if it's ur first time, just youtube it