2014 misfire

I have 2.7 liter Trd sport. About a month ago it started missing when starting. Spark plugs were replaced. Continued to miss then check engine light came on. Code was #1 misfire. Mechanic swapped #1 &3 but still showed # 1. Put in new fuel injector. Continued to miss but on 2 occasions it ran ROUGH with no response while pressing gas. Replaced all coils boots. #1 valve spring cleaned and had to replace spark plug that was 3 weeks old. Still missing when starting and still throwing #1 misfire

Any help is appreciated

 

Welcome aboard


Were the boots wet? Why did you have to replace the one spark plug?
@Dm93 and @TnShooter are resident trouble shooters

 

Mechanic said boots were shot. He also said the spark plug was shot as well and it was only 3 weeks old

 

The miss was more prevalent on starting?
Did you replace just the coil boots, or the coils?
Are you loosing coolant?

I’d start with an inspection of #1 cylinder after sitting over night.
Look for signs of coolant in the cylinder.

A compression and/or leak down test wouldn’t be a bad idea either.
Along with a cooling system pressure test.

 

More prevalent on startup. Replaced coil boots only. Not losing coolant. Mechanic seems to feel like it’s a valve issue but not sure. Should I replace the valves?

 

Did you swap the the #1 coil to a different cylinder?
Or just swap the plugs?

 

#1 was swapped with #3 but it still threw #1 code

 

A compression and leak down test is probably what I’d do next.

 

Thank you I’ll let the mechanic know. I do believe he has done that tho

 

Could it be a sensor????

 

I doubt it.
What was the actual code?
P0301 or p0351?

 

To be honest I’m not sure. I can let you know tomorrow tho. Going to have a friend hook up to his computer