cbr629

I have a 2005 f150 FX4 4x4 101,000 miles on it and under acceleration, the engine shutters/stutters between 3,000 and 4,000 RPM’s but settles down when you let out of it or once its above 4,000 RPM. It does it when under hard acceleration from a start or if you gun it on the freeway to pass people. It has never thrown a code though. I have replaced the spark plugs,coil packs,fuel pump and transmission service at 75K. Any help or ideas would be great!

cbr629

Any ideas?

jalenadams

Wish someone knew. Cause i did all that and timing chain kit and vct and phazers.