i was having a problem with my tps about a week ago, and i had it fixed....then right after that i got a 75mm TB and put it on and just lately it started doing the same thing it was doing before the new tps got put in (rpm's jumping up and down & check engine light coming on).....my question is there is a little plastic gromet looking thing the goes between the Tb and TPS....i tried to use the one that came with the TB but it seemed to be too big....so i just used the one that was in my stock TB.....could this be a cause of a problem or would it be something that wouldn't make a difference????