So my plan yesterday for my T56 Magnum XL swapped, DOD deleted, base tuned (for cam and manual swap (manual swap part done with a Camaro file by fasterproms)) was to drive until the p2135 throttle body code came back that's been throwing the car into limp mode and see if clearing the code would let me drive immediately afterwards.
Another code came up that was new, "U" something. I was stupid and didn't write it down and it hasn't come back since. Anyways, I gave up on my initial plan and just parked the car and unhooked the battery for about 24 hours and ordered a new silver blade throttle body.
After hooking up the battery to the car I'm now only getting these brand new to me codes P1516 (throttle actuator control module) and p2101(Throttle Actuator Position Performance) with the original throttle body. I unhooked the battery and put the brand new silver blade throttle body in (same as what it had before) and still get those codes.
I cleared them, tried to turn the car on and it turns over and runs by itself for about a second before dying. So I can't even try to do the throttle body relearn that's described on another post on this forum.
Engineering mode says for both the original and new throttle body that throttle position is 51.3%. idk why but it also says all my tires have 148psi, and that battery charge is 0.0%, but battery voltage is 12.1.
Is there anything else electrical that could cause this issue besides needing the throttle body relearned? I don't get why the original throttle body that was letting me drive yesterday would now need to be relearned.