63- Tp circuit below minimum voltage
81- secondary- air injection diverter (AIRD) solenoid circuit failure
82-secondary- air injection bypass (AIRS) solenoid circuit failure
85- canister purge (CANP) circuit failure
84- EGR vacuum regulator (EVR) circuit failure

so I just bought a 89 f250 and these are the codes I am getting. It idles around 1300 rpm which seems a little high to me. So I tried taking of the IAC and cleaning it thinking maybe it would help but it didint. When I put my foot in it it's like the truck falls on its face and then kicks back up? Just wondering if any off y'all have ran into this same type of situation? And it seems every code is dealing with electrical issues? Where should I start?