Hello,
First time post here other than the (test), but I've been reading various posts on this site for a while now. Recently purchased a 2020 Edge SEL Awd. Very good condition, very low miles (15k). Dealer gave me the old 'Previously owned by an elderly couple, rarely drove it, etc, etc'. Maybe that's actually true and the mileage is correct, or maybe somebody has figured out how to modify the modern odometers, I don't know. But the car is pretty darn cherry, has tires with period correct DOT stamps, the pedals don't look at all worn. So who knows. The dealer did give me the Ford Certified Extended Warranty, but that is turning out to have questionable value.
Anyway, after watching for a few weeks while the snow (Erie, PA) piled up around, and almost completely covered the vehicle, the weather broke and I finally got around to actually driving it some. And discovered it has the 'surge', and 'hesitation' issues described here and elsewhere. The term 'Bucking' seems a little extreme to me, it does not slam any shifts, up or down. The car idles perfectly, has pretty darn good acceleration when asked, and seems to cruise well. Getting 27-29 mpg on the highway. But, holy crap, mild acceleration up through gears 1,2,and 3 just make this old musclecar tuner cringe. Not really a dead miss, doesn't really feel like driveline slippage. I read someone describe it as a 'tugging'. That seems like a good description.
So, from reading posts elsewhere on this site, and one of the Ranger sites where a bunch of folks seem to have similar problems, I bought and installed a new DPFE sensor. Tried to psychologically trick myself into thinking that helped, but reality always wins, and I am forced to admit, it didn't help much, if at all. So, I bought an OBDII adapter, downloaded Forscan, and off we go.
My first road test log was looking at some variables I thought might be relevant to either the EGR and/or Torque Converter hypotheses. The lower two traces are Torque Converter slip, Desired and actual. Can't say I understand what I am supposed to be seeing there.
I have no idea why the DPFE and EGR signals chatter around like that. Looks really noisy to me.
Anyway, anybody see anything worth investigating further?
Thanks in advance.
P.S. My next post will include data from a road test with the EGR valve disconnected.