Good Morning, My 07 F150 has no power. I changed the timing chain, cam phasers, spark plugs and all 8 coils and still no power. Rough idle and bogs on acceleration. Please help...Jimmy

 

rough idle and no power to accelerate are often related to a bad COP - (coil) ..... you have no light / code showing ?

 

could be COPS , plugged CATs, or a variety of others... the CODE will narrow it down to a specific area.

 

Welcome to FTE! As steve(ill) suggested pull the error codes first and if you have any questions on what they mean feel free to ask on this site, lots of knowledge hear for the asking.

I'm going to slightly contradict myself on what I just said here and guess at your problem because I've seen lots of plugged catalytic converter's that don't set any codes and still recommend sharing any of lack of error codes before throwing money at the truck.

I'm going to guess that you likely have a plugged catalytic converter that is creating massive back pressure on one Bank of the engine, the cheapest/easiest way to diagnose a plugged converter in my experience is to back off the nuts as much as you can that hold the exhaust pipe to the exhaust manifold and create an exhaust leak before the converters. Doing so will likely set an error code and be loud but eliminate the possible exhaust restriction and run almost normally if the converter is the problem. To diagnose which side is plugged if that helps retighten one bank at a time and see if the problem returns.

From my experience with the exhaust on these trucks only use good six sided sockets as the nuts and bolts are some sort of stainless alloy that round off quite nicely with cheap sockets and the most successful way of removing the exhaust from the manifold so far has been to heat the nuts until they start to glow with some sort of torch (A plain old handheld propane torch will work if you have the time) 'so far' they always come loose with no damage to the threads or nut.