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its possable they gave you the wrong tps, thats what happened with mine, i replaced mine it didnt work, it looked just a little different on the inside where it controles how much throttle you give it. so i went back they wouldnt return it, made me mad so i wet to the junk yard and i got one from there and the junk yard oe worked just fine.
There is a TPS for the SD. It will not work for an OBS.
Well I checked the switch with an ohm meter and opens and closes just fine, the tps that I got was for a 98 e350 so that might be y, the one it shows for my truck isn't the one that goes on it. It's a female plug and mines a male plug.
What a little ***** lol! My dad had a ground hog chew through the fuel lines under his cadillac. Put it on the lift and there were bite marks all over the underside. Apparently It liked the taste of undercoating lol.
it is just a small limit switch. use a multi meter and check it, is it opening / closing when you press / release the pedal? if not, pull the switch off and check it again. if not, replace it. if it is, then you may have to adjust the little tabs that triggers the switch.