Hi guys,I have a 5.7l flex fuel recently in the past few days my check engine light came on and for some reason the car doesn't more have torque below 70kmph and the revs are below 2k Rpm and does anyone how an idea of what it could because I've gotten the coils the spark plugs and the head gasket replaced from the Ford dealership itself and I can't figure out what the issue is. The throttle body is perfectly fine. If anyone has an idea or has gone through the same issue please let me know as it's become a very big issue

 

If the work was recently done, have the shop that did the work and tell them so they can recheck their work.

 

The work was done about 2 months back and issue surfaced before that but they weren't able to figure out the issue so been driving it like that ever since