1989 Buick electra w/ rough idle and stalling issues

[TheElectraBeast]

I have a '89 Electra park avenue that i have been having some trouble with recently as the TPS went out on me and since then i have tried everything to get it to run smoothly again, I changed the TPS and have set it correctly but now I am having issues with rough idle and random idle drops while driving, the DTC codes say that it is a MAP sensor but I have not been able to find any information as to if the LN3 motor even uses a MAP sensor and if so where it is located in the car, I have also changed and confirmed the new MAF sensor is a fully working and correctly installed, I have also confirmed that there are no vacuum leaks going to the intake. Any information as to what could be causing my car to have these issues would be greatly appreciated. Thanks in advance

 

[HotZ28]

What voltage did you set the TPS closed position to?

 

[TheElectraBeast]

I have it set within the .38-.42v range I believe I had set it to .40v to be right in the middle of the factory spec that I was able to find for it