I did the swap and everything went well even the wiring, car runs strong, occationally I get a hesitation on light acceration and a hic up from time to time while driving under a light load,did my tune up,didn't help,no codes being set.could I have the wires for the injectors backwards? the wiring write up in here doesn't specify which two to connect them two once you run them into the engine bay.so I just made the connection and it hits on all 4 . could my coil be going bad? could I have gotten some bad gas? I ran 93 octane,is that the right grade. or should I be boosting the octane?some help would be appriciated, I hate just throwing money at stuff . Thanks