Sometimes engine chokes and poor acceleration on 1st and 2nd gear.

Hi,

I don't know if these has something to do with the electricals but usually this will happen when I use the car for an hour or long. It will choke and it almost stops the engine from running but it will come up again. I already have it checked with mazda and they told me that 1 of the piston has no compression. Is it possible that it is the cause? When my car is running on 3rd and 4th gear I don't experience any problem only on low speeds. Most of the time I feel like it's not moving or accelerating properly and thus I need to step on the gas more so it will move but rpm will go high. Most of the mechanics are telling me that it has nothing to do with the engine, they told me maybe the problem Is the gear. I don't feel any problem when im driving on high speed and everything I fine.

Thank you so much and hope to hear from you soon.