messed up a/f question
 

ok another issue just came about tonight when i left the shop from getting everything from my engine swap all tightened up and checked over..i left the shop and my air fuel ratio wont read properly..its not even on the screen, when i step into boost THEN the gauge reads from lean to stoich/ritch (where it should be usually) this is messed up..i dunno whats going on HELP

lab scope the o2
check wiring from gauge to source

lab scope? whaata huhhh?.??

k this could be part of the problem but not sure..shouldnt be.. i did my motor install and cracked a sensor on my throttle body..not map.the other one.. i got a new sensor for it, it worked fine..the reading was fine, and it worked..i took the car to a mechanic and when i got it back the gauge is all messed up..so would that be part of my problem??im not sure