Originally Posted by chris3058
2011 FX4 EB SCREW. 13000 kms. Recently i have developed a very noticeable surge/hesitation on light/moderate acceleration. It is most evident on an incline and feels like a hesistation, but There are no codes at all. Any TSB's relating to hesitation or surging? Going to the shop on Wednesday to get that and the third driveshaft yoke issue looked at for the shudder issue. Man. Not having much luck with my truck.
I have the same surge/hesitation issue --- and you are correct, it is on light/moderate acceleration and most evident on an incline. The dealer has determined it is an engine misfire on cylinder #5. Ford directed them to OASIS Broadcast Message #4204 which states (sorry about the length --- but read it all):
"2011-2012 F150 intermittent symptoms including cylinder misfire, stumble on acceleration after extended drive at highway speeds, flashing MIL, misfire DTCS.
Some 2011-2012 F150 equipped with a 3.5L Ecoboost engine may exhibit intermittent symptoms including; cylinder misfire, stumble on acceleration after extended drive at highway speeds, a flashing MIL, misfire DTCS, and DTCS P0420 or P0430. Symptoms may be more noticeable during high humidity/damp conditions. This concern may be caused by excessive condensation collecting in the charge air cooler (CAC) system. If a misfire concern can be duplicated, follow normal diagnostic procedures. If a misfire concern cannot be duplicated but DTCS P0420 or P0430 are present, do not replace any ignition system components. Follow normal diagnostics for these DTCS only. If the concern cannot be duplicated, and DTCS P0420 or P0430 are not present, do not attempt any repairs at this time. Engineering is investigating. Continue to monitor OASIS for further updates."
Of course my truck is in the "do not attempt repairs" mode. As for your yoke issue, mine did not go away until they replaced the driveshaft...