Here are a the TPS specs: Have you tried drying out the engine bay with compressed air or even an leaf blower ? Maybe water got in a connection somewhere. If you can take the TB off and inspect the plugs for pooling of water on the head They are kind of deep in there and do not dry out easily by themselves. Seafoam shouldn't cause the symptoms that you describe. Are you able to take it out on the highway and run it for a while to heat up everything under the hood and dry it out ? Let us know Also just replace the PCV valve, They are inexpensive. Another thought, You may have fouled a O2 sensor with the seafoam and the ECU has not cycled to throw a CEL.
throttle_position_sensor_GS.pdf