I have a 97 GL, and just today after I start my car, it acts like it wants to die. The RPMs go up and down. I never let it die, because when I put it into gear it acts fine. I ran my last tank of gas until the gas light came on, then I filled er up with Premium. (The first time I have done this). It seems to want to do this every time I start it now. I changed the rear fuel filter, but not the front one. And I recently had the Fuel Injectors cleaned at a stealership. I don't know what could be causing this, and I was hoping you guys can help me..