Lately and before this problem occurs I have started hearing some noises when the rpm gets to 3k ~ 4k when accelerating on the first gear, my car is automatic but I hear that noise only when starting from 0 mph. Now, I flat the gas pedal but the rpm keeps increasing very very slowly and it won't get above 3k ~ 4k. A friend suggested that I use the manual gears (2-L, 3, 4) and try if this solves the problem but it's still the same, the car accelerates very slowly and the rpm won't go above 4k even when I flat the gas pedal. Yesterday I have tried and put the gear on N and revved the engine and it reached 7k and the response was normal.

There are several things in my head, it could be a gear problem since I hear a sharp and short whistle when the gear is shifted up, it might be a timing belt thing though since it is been too long since I replaced it. my Air filter pipe that connects the air filter to the engine got broken and I didn't notice it until the engine shut down on me while driving. It might be a catalyst problem but if it was then the engine shouldn't rev high when the gear is on N.

what are your thoughts?

  • Have you checked the fluid-level of your transmission? Also, can you give additional info like mileage, make and model?
    – Daniel
    May 7, 2018 at 9:46
  • @Daniel The car is a lexus es 300 from 2002, The transmission liquid has been changed a month ago and its level is fine.
    – AdoobII
    May 7, 2018 at 15:10


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