I have 2 codes after my cam swap, Throttle position out of range of performance and random multiple misfire. What typically causes this and can it be corrected after tuning?

 

From my reading experience, random multiple misfire is common after cam swaps.
The TPS out of range could be your set screw got over-tight or over loose during the swap and got the voltage out of range.

If I'm right about the TPS one, its a mechanical fix (adjust set screw), programming check to make sure its spitting out
.4v >= TPS <= .6v @ 0% TPS

Confirmation anyone?

 

TPS reset is easy enough to try. Unplug TPS, (ensure TB blade is closed)turn key on, get code on scanner. Turn key off, clear code. You may have inadvertly done this, gone pwr on w/ the TPS plug not connected. From there you can check with your scanning software for proper 0-5vdc o/p when moving the TB blade open and closed.

 

I assume the DTC is P0121. If so, this can be corrected with tuning. The PCM compares actual throttle position to predicted throttle position. If actual is greater then predicted, this DTC sets. With EFILive, you will want to go to {C3907} and lower the lower thresholds.