So I changed the thermostat (unrelated issue) and ended up with a crack in the throttle body. The Crack is just on the surface and doesnt go down to the inlet tube. I fired it up and when its at idle (780~ is proper idle) it fluctuates between 700 and 1K. I drove it around the block to see if it stopped but when i accelerate and let off the gas completely it drops to the proper idle and then it spikes up to 1K and almost "kicks" the car down the road. when it spikes I get a little "Lightning bolt" idiot light when that happens. No engine code, no check engine light. I havent driven it any distance but Im a bit afraid of it starting to stall out on me. With the hood proped up you can hear the butterfly open and shut. I know Im probably going to have to replace the whole throttle body because of the crack but Im afraid of it being a different issue. Could it be the TPS? Any help? Thanks so much!