Ok i just did head gaskets on my 2000 D2 ran it for 2 days no problems going over what i did i remembered i forgot the 2 bolts on the coil pack and to tighten the bottom 2 so i did this and now i have a CEL for 4 misfire codes i cleared them several times and they just return so i removed the top bolts and loosend the bottom ones no CEL light i also checked the green ground wire on the intake and to make sure i wasn't crimping any wires with the coil pack......I'M stumped