car keeps cutting off when I stop at light.

Check all the basics, i.e tune-up parts, filters, vacuum leaks etc. Also make sure that the throttle body is clean and that the idel air motor is working correctly. Do you have a check engine light on?

i had similar issue with a couple other issues like random stalling and stalling at corners and low idle. i tried everything and ended up being bad mass air flow sensor. changed several other sensors i didnt need to and changed fuel pump fuel filter and regulators. only thing that fixed it was mass air flow sensor like a hundred bucks takes 2 minutes to change.