2005 Ford F-150 Q&A
2005 Ford F-150 Question: engine runs rough/missing
You should have a check engine light on and codes stored in the power train control module. Can you get these codes and post them? - munkyrench
I am a certified ford tech, and this is a common problem in the 5.4l 3v engine, this engine has overhead cam with variable cam timing (vct), it has phasers on each cam to adjust timing to provide more power or better mileage. but usually after 80k or so these phasers stick so at low throttle or high throttle the phasers stick and are basically backwards from what they should be. they are simple to replace but i would not recomend a DIY because there are special tools to hold timing chain and tensioners in place and if you loose where they are at, then you have to pull off the front cover and re-time the entire engine, most likely your warranty is out, so if you want it fixed then better start saving because it does not come cheap (about 15 bills)..........hope i was helpful - Visitor
i was having this same issue with my 2006 F150 5.4l and i replace all the plugs and coils and it turned out to be a fuel filter. when you accelerate especially hard the cyclinders are starved of fuel. when you accelerate gently it will not do it all the time right? mine mainly did it between 45-50 mph and 70-85 mph. Fuel Filter is a lot cheaper option. Let me know if this fixes your problem - driggers12
have replace all spark plugs and coils.problem started after power washing.have check all coils at idle by unplugging connection to coil one at a time all make engine run rough when unpluged
I have a rebuilt engine with less than 1000 miles. It was running great than I started getting a flashing service engine light and then it stayed on and the code indicates insufficient EGR flow. I ...
When i get up around 55 mph my truck has a shake in the front end until the engine warms up and it seems like it misses at that speed until the engine warms up.
i have changed plugs, checked coils, replaced dpfs for egr,it does have 225000 miles.does not set any codes, have checked for vacuum leaks, have not found problem yet.ruff idle at all times but run...