Q: Nissan Altima 06 rps go up and down and now it shuts down while driving.

asked by on February 22, 2017

Hello, well everything started when i performed a tune up, i clean the throttle body with a special cleaner, everything was fine until i decided to disconnect the connections to remove it and clean it better, after that put it back just the way it was and rps started to go up and down. i drove the car like that since it was still running, but now i notice that the engine sounds week like a super old car it makes noises like is about to shut down, and well eventually it does if i'm driving and make a hard stop the car would shut down, sometimes i have to attempted to start multiple times until it starts. currently im using uber and will be taking my car to a mechanic which i dont trust but i have no other option, i wonder if any of you guy might have any ideas. i use my code reader and shows P0300 i already replace 2 or 3 coils spark plugs were changed few months ago like September or so oil keep going quick, car runs btw if i dont press the accelerator the car kind of slows down. ty al

My car has 210000 miles.
My car has an automatic transmission.

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