lots of black smoke and popping sound from exhaust at higher rpms

[ih1066turbo]

ok guy reall dont know what to do i hav a 05.5 and it started making alot of black smoke and popping through the exhaust tokk it to the dealer and he ran a test on it and it showed #1 cylinder was only running 80% so he ran a compression check on #1 and it showed 375 so he put a new injector in #1 and it showed no change still ran 80% the truck is stock I NEED HELP LOL

 

[Howling]

More than likely your going to have to pull the head to see any more.Or look for a valve that is lower than others.

 

[ih1066turbo]

well thats kinda what i was thinking too i wonder if its a valve