V6 (1994-2004) Mustangs Technical discussions on the 3.8L and 3.9L V6 torque monsters

Multiple codes on my stang'

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Old 06-23-2012, 04:36 PM
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RamUri1
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Default Multiple codes on my stang'

Hey guys, I have a 03 mustang 3.8L and a few days ago i had my check engine light turn on and my car started to stall. I scanned for any codes and i got PO316(misfire in first 1000 rpm) and PO303.(misfire in cylinder 3) I check my spark plug wires and found out my wire to spark plug #3 was all messed up so i replaced it.

I deleted the check engine light and took it for a drive. Again it started stalling but now i have 3 codes!..CO703, P1603, PO303 (random cylinder misfire) Can anyone please help me figure this out?
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Old 06-23-2012, 06:16 PM
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RyansQuick6
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Sounds like a bad coil, plugs, or wires. Buy some MSD wires, NGK TR-5 plugs, and a Motorcraft coil.
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