06 Gt Misfiring On Cylinder 4

Midnight 06

New Member
Mar 30, 2017
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I have a 06 gt and I replaced the plugs to motorcraft platinum. No problems until I got on it at it started to misfire on cylinder 4.

I hooked a noide light to the injector wires and cylinder 4 had a weaker pulse than the others.
And I checked the plugs just to make sure there was no cracks. And it is throwing code: p0354 but I'm sure the coil is fine.

I don't know how to go about fixing this.
Car isn't stock and any input is helpful at this point.
 
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