Today I power washed my motor and I was very carefull to cover any sensors I could when I was done I started the car and took it for a drive. The car runs great but stalls when it is dpoped into gear(auto trany). If I slowly bring the idel down it stays running but the rpm's go up and down, what do you think is the problem I was thinking tps switch because of the rpm's going up and down. If I do need a new tps where is the best place to get one and how do you adjust it(I have a milivolt tester) THANKS