Have a 2014 F150, has developed a misfire on bank one(P0300). Took to dealership, was told to change plugs. I did but did not help. Another ford mechanic said to change injectors, that didn't help either. Can't afford to keep throwing parts at it. Anyone else had this problem?

 

there are only a few things that typically cause a misfire:

plugs
injectors
coil pack

It's a tough guess sometimes which one is the culprit.

 

It definitely is, wouldn't be so bad if it was just one but it's bank one. All four, I swapped two coil packs one from each side and no difference. Thanks for responding.

 

I'm currently having similar issues with my 2015. My misfires are on bank 2. I think I have narrowed the problem down to the variable camshaft timing solenoids specifically the intake solenoid on bank 2. I can explain things I've checked that led me to that conclusion if you end up wanting that info.
My truck has close to 133,000 miles. How many miles does yours have? And do you have any other symptoms?
I've always looked at these forums but finally just made this account in hopes of some mutual aid.

 

Mine is bank one, only codes are miss fire and o2 sensors bank two. Not getting any cam sensor codes at all. Nothing else at all. Info would be much appreciated. Can't see o2 sensor on bank two causing miss fire on bank one. 213k

 

OK I actually don't have any codes so mine has been interesting to get to the diagnoses where I'm at now. I did change both of my upstream o2 sensors towards the beginning of my process because I had some readings that seemed strange but I didn’t have a code. Is your o2 sensor code saying that it's out of range or is it not having any response?

 

Not sure on the o2 code, it is on downward side opposite side of bank 2. Problem is on bank one. No cam codes or crank codes.

 

Did you ever figure out the root cause here?

 

I replaced the spark plug, coil & fuel injector all with Ford products. After resetting the code, it will come back in short order. It comes on immediately when cold. Help!

 

what was the final fix?