My mustang has this weird hiccup where it feels like it jolts back and forth like a bad shift when im accelerating sometimes. It does this enough to be noticeable but not in regular patterns. Its all stock under with 95k miles and a 4 speed auto. Thanks if you can help
It would help to know what else is occurring with the PCM and sensors at the time. How to find this information? A good way is with a graphing ODB2 scanner that is capable of monitoring and saving key data over time.
Here's some information on an affordable Windows based unit that can acquire the key information.