Q: What can I do??? Sounds like I have Sticky Valves on 1999 Ford Expedition

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
1999 Expedition V8 5.4L
Rough Idle
Engine miss
(2) Answers
review when last tuned. it may be due.
rec. fuel system clean. ethanol treatment to one tank premium fuel. ethanol blend in fuel causes build up in fuel system, combustion chambers, exhaust system and causes increased wear to spark plugs. remedy will help sticky valves. result will take drive time.