My obd-2 Gsr is throwing a code for random misfire in cyl 2.I checked the plugs and wires...replaced them and its still thowing the code. what else should i check? Even be4 i replaced all that i could never feel a misfire although i did notice a change in the idle when the code popped up. Could it be my fuel system? Would a bottle of fuel injector cleaner solve that? The blinking light is really starting to annoy me and the last place i want to take my car is the stealership i mean dealer ship.