Ok so, had this problem two weeks ago:
Low coolant light was on and has been coming on every morning and it will shut off after the car warms up. < This was my initial visit to my dealership. And THEN this starts happening: the car hesitates when first accelerating from a stop light. I can feel it lag, like a small*****. Then, while its in idle it will shutter slightly. I have taken it to my dealership and no codes pop up. They checked the coolant and said nothing was wrong with it. Since taking it to the dealership the light went off. HOWEVER, they couldn't find the problem with the hesitation and the shutter. So I filled it up with some STP fuel injector cleaner and everything was fine for TWO WEEKS. Well I could still feel the***** but not so much but the shutter was gone.
TODAY: I had to fill up again this morning and the problem has re-appeared with the slight***** and the shudder. My dad thinks it's the fuel injectors but I'm not sure. Please HELP!
Wednesday, October 12th, 2011 AT 9:47 PM