Took my car in to get the tire and headlight replaced. Not my usual mechanic. While they were in there, they took it upon themselves to open up the filter and root around the throttle body. They said it was heavily gunked up, and asked to clean it. The car has been having serious starting issues, so this made sense to me, so I overlooked them examining a part of the car that had nothing to do with what I’d asked them to repair, and told them to go ahead.
Mechanic cleaned out the throttle body. Now he says there are scratches in it, he suspects from a mouse or rodent. Says it needs to be replaced, but he couldn’t source a part today. Either way, I can’t afford that. Says it’s fine to drive, though.
Whatever they did, the car is now worse. Engine revs up high in park or when I start the car, and then drops dow and keeps revving rhythmically while idle. And I swear that while in drive, it’s running faster even with my foot off the gas, and not dropping out of higher gears as fast. I go back and confront the mechanic. He says yes, that’s all because of those scratches. But I don’t understand how before, when it still had these scratches, WASN’T clean, when it was, in his words, all gunked up, it was working BETTER than it is now, when it’s clean and just has those scratches?