Car runs poorly, code 126

[pendelton]

I got a 92' MTX and this thing is running like garbage, it will idle and stay idling at a good 1k RPMs, its just that i have a SERIOUS lack of power, when i go to step on the gas theres much hesitation aswell, i got a check engine and when i did a KOEO test it gave me a code 126(MAP/BARO sensor higher or lower than expected) I did however replace the MAP sensor and its still giving me this code. A few things i did to try to get it running a little better was unplugging the MAF and test driving, that did not change my performance, it still ran like crap. Then i unplugged the BARO sensor(the brand new one i just bought) and that did not help or hinder performance either. Im stuck now, i figured id see what u guys think b4 i take her to the garage. Thanks much