Okay i went to autozone today and they put the scanner on it they didnt give me code numbers but said that the mass air flow sensor had too much voltage and it was running rich and that there were other faults such as o2 sensor and cylinders not firing. I used some mass air flow cleaner on it and it didnt seem to make any difference.Conditions were worse today before even cleaning it. It was shifting really hard and sputtering even worse than yesterday at times i could only go 20 mph and i had to let allmost all they way off the gas to get it to go at all.also backfiring.any ideas?