2004 F150 4.6 running bad no codes
 

So I have a 2004 F150 Super Crew with a 4.6. Has a cold air system put on it about 4 years ago. Had no issues. Have 96k on it and have replaced all plugs and 3 COPs. Truck started missing bad with no power a couple of days ago. Cleaned throttle body, and MAF. Installed new EGR. Maybe worse now then before. Has new gas. Don't know what to do since I'm not getting any codes. Please help.
Thanks
M

Had issues with my 4.6 f150 back in October 2015 engine was running bad then got worse and I tried to fix found out the timing chain guides were bad cause the camshaft to go out of sink with the rest of the engine ended up breaking rocker arms and damaging the piston so I had to replace the engine. It wasn't cheap