My 1997 F150 has a slight miss under load at intermittent times betweet 2000 and 3500 RPM.

I have replaced everything that OBD suggested and there are no new codes, but it still hass the "flutter".

Could it be the EGR tube is clogged? I'm stumped.

Thanks

 

what were the codes that you were shown??

 

Ford has had notorious problems with the egr. I've seen alot of misfires and busting up on the f 150's due to a bad coil pack. You might want to look into those. Usually the first one to need replacing is on the passenger side.