Hey guys! So I recently pulled my engine out and a did a transmission swap on my 1999 Audi A4 2.8, and that was a success, but for some reason when I go to start the car it barely even idles, it idles around 800rpm but when you rev it, it just dies, it sounds Iike the engine needs more air. I got a newer MAF sensor and barley helped, then I swapped the throttle body and it didn't really change. Every time I go to scan it keeps throwing a throttle body code P1545. I tried doing a DIY re- alignment but nothing seems to be working. Could this be an ecu problem? Or do I need to change the throttle body? What do you guys think?