unless there is a code for the TPS, it cannot cause surge issues. the TPS just doesn't have enough influence in the code to do that... the ecu doesn't use the tps signal that way.
Joels writeup linked to by wbrockstar (above this post), has a TPS mythology thread which will discuss this in detail.
24's won't cause the car to run rich, unless the MAF/Inj/ecu setup is mismatched.
I would leave the 24's, but confirm part numbers and color code of the sample tube in the MAF. If no color code is visible, pull it apart and measure the inlet/outlet of the sample tube.