Tonycarlo

interesting ...thanks... I did the EGR sensor change and no help there.... I think this is the next logical step.....

changed the EGR sensor yesterday, no difference in driving out of my mechanics.... will give it another few days.... next up will be the TSB 21-2081 to reprogram the powertrain module....

agree.... dont know why I said yes to it but I trusted they know what they are doing.... that was a mistake...

my dealer said oh we've seen that before you need a rear diff fluid change and reprogram.... $650 CAD and a few months later I still have the problem....

thanks, this is a ridiculous problem ford should be doing a recall for.... im out $1000 as of right now and still have the problem..... finally got the EGR sensor ordered so will see what happens when my mechanic installs it....will let everyone know in a couple of weeks....

might as well do it... you're under warranty ... for me its a huge expense and im already out $1000 for the sparkplugs being changed (my mechanic idea as his computer was showing misfire code ) and the rear diff fluid and reprogramming by ford dealer....which was a total ripoff and i dont know why I agreed to the price.... here is the confusing part.... my mechanic said stop putting in 87 octane gas and use 91.... I did this after the ford fluid change and reprogram in June.... they said wait a few days for it to relearn etc.... i waited about 2 weeks and the bucking/stutter problem was almost unnoticeable... i was so happy that my $1000 spent was not wasted.... but then I didnt know was it the gas octane change or the fluid / reprogram? or both? I ran with 91 gas for about 2 months and then out of nowhere the problem starts again a few weeks ago.... back to square one... so the gas is not the fix.... but I will keep running with 91 anyway even if its more expensive, my mechanic says dont use 87 or you'l get worse mileage and more issues later.... my mechanic is also very skeptical of the rear differential being the problem , he says you would notice way worse driving if it was actually damaged etc.... he thinks its something else.... I have noticed a slight grinding noise in the rear diff for years when I make a hard left or right turn.... so maybe its finally worn out or something.... the whole experience is very confusing.....

the problem is it may be the rear differential ... thats what my dealer said.... I called ford customer service because im out of warranty and they offered to cover half the bill about $1000 im still going to try the EGR sensor replacement first.....

ok thanks, that looks like the EGR valve sensor not the DPFE though? https://www.summitracing.com/parts/smp-vp41?srsltid=AfmBOopBtSaOPN6WeosR05aPsVf8VRPZbNHboyBZ_RkxMJAgK9XnKHPj

Was it the egr valve or DPFE sensor that was replaced? Or both? Thanks...