i own a toyota celica ST162 1989 model 2.0 liter. The problem is the idle was high and when i hit the accelerator or let it fully go it jerks a bit i got told to check the throttle position sensor i did and a bit of plastic broke and i moved the switch inside and put it back together i got told not to touch the switch cause it will stuff all the revs and that of the car is this true and what can it do to my car if i drive it without getting checked???????????????