few q's bout my vp

[The Darkness]

ok first of all checked codes and got 3 up. 13, 34 and 44. now i know 13 is oxy sensor and that causes code 44. but 34 which is map sensor voltage is too low. will replacing the map sensor fix this, where is it located and what do they roughly cost. i also suspect my fuel pressure regulator is faulty, is this located behind the thottle body? how can i test that. just trying to get better fuel economy atm. will be getting a greenfoam memcal as well. cheers for helpin me out

[LowVp]

map sensor is on the firewall on the passenger side, its about 75mm long and nearly 50mm wide with a 1/4" rubber hose running off of it and a 3 wire plug.

fuel regulator is on the end drivers side fuel rail.

[The Darkness]

ah yea i know that sensor. cheers for that will do it tommorow. gotta do engine mounts and centre tailshaft bearing too......fun