This past weekend I went and filled my tank up and that is when it started running terrible. If I drive the car normal it runs fine. But right when I stab the gas real quick or put it all the way to the floor it starts cutting out. Is it possible I got a tank of bad gas? Well anyways I hooked a scanner up to it and it was saying there was something wrong with my O2 sensors. So, I replaced the front 2 and still didn't change nothing. I bought new coil packs, still nothing. The plug wires look good. I did pull a couple spark plugs and it is running lean. I cleaned the maf which it wasn't really dirty but no luck there either also bought a new fuel filter. Do you think the maf is bad? I am running out of idea's what to to try next. Any help would be appreciated?