go to where you can flush out the fuel injection system. change all filters and then take apart your TPS and clean it as well. Now that you eng is cold pull your plugs and read them. If they are good get your Ohm meter out and check your wires. Then get a node and check your Injectors. Once you can claim she is clean you will have only a few places left to check. Some which can be costly. But you will know what it is not.