I have a Mazda 626 (sedan) -97 and lately its been running uneven and jerky.
Have had in in for repairs and changed battery, oil+filter and spark plugs. Still had problems and tried to use a engine and fuel injector cleaner (brands STP and Red Line).
This solved the problems temporarily. Until I had to refueled with gas again. I have done this process twice now with same results, and while the problem is gotten less it is still uneven and jerky with a new tank of gas.
Problem seems to worse at low speeds. And if you let go of the gas the speed will will go down until the car stalls.
Any suggestion or ideas?