I have a 1999 sunfire with a 2.4L that has a slight miss while sitting at idle speed. It is tripping code P0300. I have replaced plugs, boots, coils, coil housing, and the timing chain and sprockets. I can not figure it out. Autozone is pointing to vacuum leaks, but I could not find any. They also said it could be the injectors. I did a resistance check, and they all have about 15 ohms of resistance. Is there another test for these I can perform? Any help would be GREATLY appreciated.
