need help with the ole s13

[redsilvia66]

so i took out my old rad and put in a koyo. done deal no prob, but while taking out the stock intake i broke the maf sensor. so i bought a new one and put it on, but now my car bogs and shutters really bad after 2.5 rpms.in every gear!! like first instinct is to put the clutch in cause im so worried. i have tried to press on the gas while it is bogging but it doesn't go any faster, it just jolts.
things that i have tried,

1.got a different maf sensor...didn't work
2.checked all connections
3.unplugged the battery and left it over night

when i check the ecu it says that i am throwing a 12 code (maf). i am thinking that maybe there is a connection that i am forgetting. please help.

car is an s13 coupe. with a ka24de. everything stock in the engine bay

[s13dan]

sounds almost like your car isnt even reading the maf... is the maf new from nissan or used? maybe return the current maf for another and check all wires.. i dunno, good luck

[redsilvia66]

thanks for your input. i got it used because if i didn't then napa auto parts wanted $989.00 for a new one.