CYLINDER 1 MISFIRE ON COLD START

[PNWEddieBauer]

New member here. I have a 2004 Expy 5.4L Triton Eddie Bauer Edition.

Lately, I've been getting a cylinder 1 misfire ONLY on a cold start. This lasts anywhere from 20-30 seconds, then the car runs like normal.

Things I have tried:

New spark plug in Cylinder 1
New Ignition Coil for Cylinder 1

These did not fix the issue.

I have a new fuel injector on the way as I think it could be that next, but does anybody else have any ideas? If it's not the fuel injector in cylinder 1, I have no idea what it could be from there. Any and all advice is appreciated.

 

[whtbronco]

It could be a connector or wire issue with any of the items you mentioned or carbon build up in the combustion chamber.

 

[BlackCoffee]

Cylinder 1 is notorious for being a indicator of a bad head gasket. Next time the engine is cold, pull the plug and see if there is coolant on it. When the engine cools, if the gasket is starting to leak, it lets coolant in until and causes a misfire. Are you losing coolant? That would be another indicator.