hi guys this is my first post, ive converted an N/A to a turbo (i got a glanza and a week after a got it it got robbed and smashed up so ive put the engine, eletrics ect in to an N/A shell instead of repairing the old one) ive just finished and got it running but its overfueling like mad, and coming up with fault code 31. i belive this is map sensor i was just wondering where to get a replacement as toyota want £250 any help would be great