legacycentral bbs

Okay so I have a 95 legy with an ss swap

with a Rob tune I just got done switching from an STI build to a full rotated holset hx35 frontmout ej22t the works, and I'm running lean with the STI 550cc injectors (obviously) the afr's are good to about 18psI (afr's are 12-13), anyways I had an apexi afc neo I bought a while ago and I figured i might as well put it in so I can get more from the injectors till I go bigger. But the issue is I can't calibrate the voltage/tps sensor I've tried it about 20 times I've messed with this thing for at least 2 1/2+ hours and i can't get the voltage to stop working in reverse on the afc, I've been online all day trying to find some info to help and nothing, so I'm giving this a shot. Idk if the Rob tune is messing with it in anyway but any help would be awesome.

those injectors are way too small for 18psi on a holset. i wouldnt run more then 10-12psi. you need at least 750cc. its not the tune thats the problem, the injectors are maxing out. afr's in the 12's-13's is way too lean. mid 11's is where you want to be. turn down the boost and get bigger injectors before you blow your motor.

I know it's to lean, the real problem is the afc/rob tune why isn't the afc neo working could it be interfering with each other?

Bump

Are you Damien or his son?

I would fix your injector problem before you tackle the AFC issue. You can't monkey with something that is maxed out.

Welcome to the BBS.

Are you asking why the voltage is reversed for the TPS, i.e. around 4.76 V when closed and 2 V or so when open? If so, the reason is because that's the way it's supposed to be. The older TPS's are setup that way.