So I have a JDM B20B in an EK hatch it wasnt running for about a year. I have an AEM fuel Rail with AEM Fuel pressure regulator, intake and exhaust system and i have both Hondata S300 and a chipped P28. No matter what i use though the car idles at straight 10 on my Wideband. I know its supposed to be at 14.7 and wheni rev it it goes to 11 - 13 more or less and leans out when i let go. Now when i let go of the gas it almost stalls out cause it drops to only a few hundred RPM before picking itself up. it also stumbles on acceleration and almost sounds like its 2 stepping even at about 3k RPM. It sounds to me like its over fueling. My fuel pressure was at about 44 and we dropped it to 25 - 30 and it idled a little better i think but still ran kinda messed up but that was only briefly. What should my fuel pressure be at? im almost positive my MAP sensor is good and im calibrating my TPS now. what else could be causing this? I obviously want it to idle at 14.7 and not stumble anymore or have to catch itself wheni get off the gas. thank you in advance

 

Have you checked your ECT?

If the ECU thinks the car is cold it will continue running in open loop which would be rich.