Can anyone tell me how to test a tps for a 225 excel? There was a diagram in a Clymer's manual and it was not clear. I applied 12 volt to the tps with a jury rigged test harness and I think I ruined the sensor or the computer by inadvertently crossing some wires. Also, when I disconnected another sensor, the thermo-sensor, the motor ran a lot better, leading me to believe that that sensor was defective. However, there was no difference in performance when I connected a used replacement sensor to the ecm. So, I eliminated that sensor as the problem. I ran the motor today and there was no performance difference with the tps connected or disconnected. If the computer is bad, then all I'm doing is replacing sensors to no avail. I could go broke throwing parts at this. I know this is a long first post, but I do appreciate any help out there. Thanks is advance.