My girlfriends Accent is acting kinda weird. While parked or just stopped, it'll shake a bit and stutter as if it wasn't getting enough feul or something. I though it might be the injectors being dirty so I tried some of that feul injector cleaner. Didn't work. Anyone know what else could be wrong with it? It drives perfect, just shakes and feels like it's going to stall while in parkl or stopped. It has about 55,000 miles on it and it's an automatic.

*I think it might be the feul filter but?

I think it's probably fuel related too but have you checked the plugs and cables? Any CELs?

My '99 Accent did something similar before I traded it in for this Elantra. It would sputter while accelerating, like it wasn't getting enough fuel. This started at about 120,000 miles. I did a tune-up, replacing plugs, wires, air and fuel filters, and did an oil change. It didn't help. Went through a couple of bottles of fuel system cleaner and that did nothing. I'm guessing it was caused by one of the sensors going bad. Not sure which one, as I didn't keep the car long enough to find out.

Axel

At 55k if you have not changed the fuel filter already, it needs to be.

Also, unrelated, but it is time to do the timing belt.