Smithboi1

Iv just recently put a vf35 turbo & 565cc injectors + remap on my 05 wrx, after two days the engine management light came on and at low speed it was running abit lumpy and struggling to start without alot of acceleration i took it back to the garage who fitted the parts and done the remap they found it was the crank position sensor and i was told it may have been due to the remap so they cleared the code and it seemed to be ok after that but a day later the light is back on and its back to running lumpy at low speed and laggy on the acclertor, before i go and fork out for a new sensor i wanted to be sure im going down the write road ? Can anyone help ? Cheers