If you had an issue with grounding the starter trigger wire it's likely you're looping interference thru the ignition booster ground and the coil is picking up interference.

The other thing I would need to know is your car, is it setup with 02 feedback on or off. If the feedback is off it's probably going to run shitty right now because it's snowing and cold and the air quality is like 13000ft above sea level and you have no correction table setup if you're running closed 02 feedback. It could just be cold out so don't go changing a ton of stuff because it's going to be 70 degrees tomorrow.

You could potentially have a clutch issue, have you changed anything on it? Have you checked the fluid? When was the last time you drove it?