usually it's not the sensors anyways.
check the voltage on the tps.
take the idle air control off and clean it inside with some carb cleaner.
make sure everything is plugged in and you don't have any broken prongs on any of the plugs to the sensors.
also clean inside the throttle body with some carb cleaner.
make sure the gasket on the iac and the throttle body are good, (hell you could get really cheap and make them out of thin cardboard! I've seen someone do it and it works)
usually a surge idle is the iac filthy inside with build up/varnish from old fuel.