I have a 2003 Buick Century with about 109k miles, lately i've been having issues with it when coming to a complete stop and resuming by pressing the gas, once you reach 20mph the engine starts to sputter after a few seconds its okay then reaching 40mph the same problem occurs.
I've replaced the spark plugs, the wires, the fuel filter, the pcv valve i've taken it to get a fuel injection cleaning and transmission flush, not sure what else it can be???
The service engine light has been on for a while, Autozone said it was a misfire, but after the fuel injection cleaning it went away, but after some driving it came back on.
What i have noticed is that when i reach 20 mph once it has problem i let go of the gas, then step on the gas again so that it won't struggle sputtering i feel the engine jerk (not a transmission jerk) but that feeling as if the car might day (more sputtering)
Any one have any ideas or suggestions???
Thanks,
