04 F150 Rough Idle When Warm. There are many other possibilities causing these idle. Not bad at first but now its bad.
- Answered by a verified Ford Mechanic no check engine light on. Truck idles when first sta. Ford F150 Rough Idle Causes Hopefully the check engine light is on.
Ford F-150 2004-2008.
However it is easy to recognize the problem as during rough idling either the engine would run at an irregular rate or it may have varying RPMs without your foot on the gas pedal. The truck has a 54L engine. It actually starts fairly nicely and idles smoothly. Once it warms up though after maybe 10.
