Misfire in cylinder 3 ... need help identifying unplugged wire

[jkbPontiacGTP]

I have a 2002 Pontiac Grand Prix GTP that is receiving code P300 - Misfire in Cylinder 3. I have changed the spark plugs and[FONT=&quot] Wires, and I've checked the [/FONT][FONT=YouTube Noto, Roboto, arial, sans-serif]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.


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[Scottydoggs]

we all got unused plugs under the hood, its normal.

try swapping #3 injector with 1 or 5, your looking for the miss to move.

 

[Fivefingerdeathpunch]

Check compression while you are at it.

 

[mark97564]

Tune-up replace the plugs and wires and use acdelco parts