I've got a 5th gen with a h22a (from sir accord) and boosted. I tried getting it dynoed with a fmu and the map sensor cel (cel 3) came up when trying to hold boost. I've swapped over sensors from another accord and the same problem comes up and the car just goes into limp mode and therefore it can't be tuned.
Does anyone have any suggestions?

Thanks!
P.s. i cant afford an aftermarket ecu that has a 3bar map sensor.

 

you need to trick out the ecu from seeing the boost... missing link, check valves, map hacks, map controllers, etc all can do this.

anything much over 10 psi is risky in my opinion with these methods and no serious fuel management (ems, hondata, autronic, motec, etc...).