[updated:LAST EDITED ON 20-Sep-02 AT 09:18 AM (EST)]Changing the filter can be a P.I.T.A. Try a little wd-40 or equivalent in the connector and clean them out best you can. If you need to, you can pull the springs out with a scribe and replace them. {Parts stores or a Ford dealer have them.} You are looking for a spot in the tps where voltages sweeps up and down erractically. It should read voltage steadily as it goes up. The range is from about .92 volts {at throttle closed position} to 4.5 volts, at W.O.T. There is a bushing kit for the dist. also at your Ford dealer or parts store. Good luck.