Hello,

I own a 2004 F150 SCREW FX4 with about 58,000 miles. I have had the cam phasers replaced, i replaced the plugs recently, (only 6 of the 8 broke) and I cahnge the oil regularly. I have driven my brother-in-laws truck as well as a co-workers truck only to realize my truck is a dog. Their trucks are a 2005 supercab fx4, and a 2006 supercab 2wd. Both with 3.73 gears and the 5.4L. It is a night and day difference between my truck and the others. I have no CEL and it seems to run fine. I get a shake at 80+ MPH on the highway. I have the rotten egg smell emitting from the exhaust. What do you think? Do I need a PCM flash? Clogged Cats? I need help. I have pumped some cash into this truck. Thanks

 

Subscribed, similar issue.

 

Frustrated, I bought a lemon. It was used of course.