Whenever I’m idling in park, seemingly after the engine is warm after driving some distance, the car repetitively nearly stalls. It will rev normally, then drop to zero, then rev back up, and drop to zero over and over as the car is running, and causes some serious vibrations. I do know that I have an exhaust leak somewhere, but again I don’t know if that has something to do with it. Additionally, although I’m aware it is winter and I’ll get shittier fuel mileage, I seem to be averaging about 300 km to a tank of gas, which seems pretty rough to me, but again I have nothing to compare it to. I’m no mechanic by any means, so I’m hoping someone could help me identify what’s going on here. Just a stock KA24DE s13.
sounds like it could be a vacuum leak, exhaust leak would just make noise.
My thoughts primary o2 sensor , maf/map sensor , Iacv or maybe even a exhaust leak b4 the primary o2 sensor(highly doubt this is ur problem)
Injectors