I recently put a turbo on my 2001 accord v6. I’ve noticed that when I get to around 2 psi, rpm’s stop climbing and I’ve determined that the engine is running lean. Could anyone tell me what sensors determine fuel input? I know the engine doesn’t have a MAF sensor, so what sensors would measure intake air and determine fuel input?

I ask because if I can get an upgraded/better sensor that would allow the ECU to correctly monitor the AFR and inject the proper amount of fuel, it would be easier than getting bigger injectors and messing with everything that comes with that.

 

The factory ECU doesn't understand boost. It is likely that once the MAP sensor detects a pressure greater than atmospheric, the ECU believes this to be a problem and throttle input is reduced. The ECU doesn't have tables for boost, so it cannot compensate for this... and this is why you will need a "Rise Rate" FMU and some way to reduce the MAP sensor from detecting boost... tuning tech from the late 80's to early 90's.

 

Could I potentially get a plug n play like Unichip instead of a different sensor, or will the sensor’s input reading still not be accurate above atmospheric?

 

Sorry, I’m new to forums, but I’ve posted my “reply” question above.

 

Optimally you would get a standalone ECU and a tune but that's likely out of the question, especially if you have an automatic.

Either way, if you continue to drive the vehicle as it is you will destroy the engine very quickly. You are introducing A LOT more air into the engine and as such need a lot more fuel delivered, in a precisely controlled manner.

I honestly still have no idea how people can get SO FAR into a turbo setup/project and not realize this. Even if you buy the best of the best setup, it's still worthless without a proper tune.