I have a 2002 Pontiac Grand Prix GTP that is receiving code P300 - Misfire in Cylinder 3. I have changed the spark plugs and Wires, and I've checked the coils, crank sensors and ignition module... which are working fine however i am still receiving a misfire in cylinder 3. I bought the car used an the previous owner did a hack job under the hood and left wires unplugged so I'm trying to figure out if one particular wire could be the reason why I am receiving code P300.
I have attached a photo of the unplugged wire in hopes that a member can help me out in identifying where the wire should be plugged.
