I swapped this B20B in my 96 hatch about 2 years ago and ive been on and off working on it since. Its a stock engine with an LS trans and I have a chipped P28 or i also will use my S300 Hondata chipped P28 sometimes also with a B20 basemap. No matter what i use the car just runs awful. A few weeks ago i had it running, it idled for a little and ran alright for a few mins but lost all power after a little while. battery died and fuel pressure dropped to 20psi. Turns out my alternator fuse was blown so i fixed that and im running stock injectors with an AEM rail and regulator but my regulator diaphram ripped. I got a stock regulator on the AEM rail and hooked it up and now it has about 30 - 40 PSI i dont remember which and when i start it idles at like 500RPM and when i accelerate it sound like it has an awful misfire and dies as soon as the RPM drops back down. It also smokes like crazy whitish blue smoke. On top of all that, my AEM wideband used to work and now it starts at about 14.7 and drops to 10 while its running and as i drive just goes erratic. It will say its at 12 while im cruising at 30mph in 3rd gear about 2000RPM and then go from 12 to full lean to 14 and when i accelerate more not even move. and when I let off the gas it wont go full lean like its supposed to . I have a bosch sensor on it now my origional AEM sensor went bad. The car is running so rich and I can't figure out why. The chipped ECU i can understand but my Hondata on a basemap shouldnt be that rich. Im at a loss at this point, any input is appreciated. The only thing i can also think of is i have a speed factory throttle position sensor that i only calibrated on my Hondata im gonna try calibrating its positioning and recalibrating through hondata but i can't imagine that being the cause of all this. thanks in advance

 

It sounds like the car is running rich. The basemap you are running might need some fuel from the table removed. Post the tune file you are running and a datalog and i can take a look at it. Make sure the wideband is connected to the s300.

 

I’ll try and send it later it’s legit the basemap for a stock b20 non VTEC from Hondata s300. I only calibrated the TPS through the program I never moved it. I’m gonna try manually calibrating the tps. I also have an AEM wideband set up but my sensor went bad like it’s stuck at 14.7 and never moves. I have a Bosch one installed that plugs right in I got from Autozone but the readings are so bizarre I almost feel like they don’t communicate well. So I’m gonna get a new aem wide band and I’m also getting a 4 bar map sensor as well. I’ve had issues with the map before so I’m using a used one now.