I have a 2004 Honda Civic with 194k miles on it. Car is well maintained. Just recently it got cold in NY and the car started doing some weird stuff.
Basically, when idling at a stoplight, the cars rpm will fluctuate between 500-1000 and almost go to the point where it feels like the car is dying. Turn the car off and back on and it works fine but happens again. Also, when driving at a wide variety of speed the throttle response will be jerky (constantly pressing the peddle but the rpms bounce around and feels like the car is stopping and going).
The car is clean otherwise, not a single issue!
Any help or pointers would be much appreciated!