i have a 2008 dodge avenger se engine light is on and it has two misfire on cylinder 3 and 4 the code is p0303 and p0304. the car runs like it wants to turn off and when it in drive and i stop at a light or stop sign it has no problem when im driving but the cylinders work when the car is started and then turns off. and my air box has a little oil on the filter to