just had valve job done. Compression incresed from 35 to 85 in one cylinder. The others have 120. This has improved runnin at low speeds. Now when I get to 55-65mph I have a miss with loss of power.

 

Need to check fuel pressure. The fitting is behind the passenger side of the upper intake. Should be around 60 psi. Try cleaning the injectors, the 4.9 has a tendency to dirty them up pretty good. Post more after you check these out.

Robbie