Bucking/Surging Epidemic

[Yinzcity]

I suspect I'm having the same issue with my 2019 Lariat. I get a shutter/misfire around approximately 25-45mph if the engine speed is under 2000 RPM and I apply just a little bit of gas. Easiest to replicate when rolling along a flat road. If I find the right "spot" I can get it to misfire for a few seconds until I change my throttle input or the road changes, but never any codes. Forscan shows misfires evenly across all cylinders, 6-15 counts in a 1/2hr drive. I replaced the plugs and checked the coil connections with no luck. Same with clearing the adaptive trans tables in Forscan. Its been at the dealer since Wednesday, they were able to replicate the issue, they also replaced the plugs without fixing it. Apparently they are talking with Ford about it now, mentioned they were looking at shimming the rear axle or something too. Will report back with what fixed it when its done.

Sponsored

 

[Larry]

I suspect I'm having the same issue with my 2019 Lariat. I get a shutter/misfire around approximately 25-45mph if the engine speed is under 2000 RPM and I apply just a little bit of gas. Easiest to replicate when rolling along a flat road. If I find the right "spot" I can get it to misfire for a few seconds until I change my throttle input or the road changes, but never any codes. Forscan shows misfires evenly across all cylinders, 6-15 counts in a 1/2hr drive. I replaced the plugs and checked the coil connections with no luck. Same with clearing the adaptive trans tables in Forscan. Its been at the dealer since Wednesday, they were able to replicate the issue, they also replaced the plugs without fixing it. Apparently they are talking with Ford about it now, mentioned they were looking at shimming the rear axle or something too. Will report back with what fixed it when its done.

It was well worth betting $15 & $7 shipping and a 1/2 an hour of my time to test if the EGR Sensor sited in earlier posts solved the problem for me, which it seems to have. You should be able to order it from any number of online parts sites. Best of luck!

 

[Yinzcity]

It was well worth betting $15 & $7 shipping and a 1/2 an hour of my time to test if the EGR Sensor sited in earlier posts solved the problem for me, which it seems to have. You should be able to order it from any number of online parts sites. Best of luck!

I'd certainly give it a shot, but it had to go to the dealer anyway for the paint peeling off the cab rain rails, so they're looking at this too. If they can't get it I'll do the swap myself.

 

[Nyghtryder]

I suspect I'm having the same issue with my 2019 Lariat. I get a shutter/misfire around approximately 25-45mph if the engine speed is under 2000 RPM and I apply just a little bit of gas. Easiest to replicate when rolling along a flat road. If I find the right "spot" I can get it to misfire for a few seconds until I change my throttle input or the road changes, but never any codes. Forscan shows misfires evenly across all cylinders, 6-15 counts in a 1/2hr drive. I replaced the plugs and checked the coil connections with no luck. Same with clearing the adaptive trans tables in Forscan. Its been at the dealer since Wednesday, they were able to replicate the issue, they also replaced the plugs without fixing it. Apparently they are talking with Ford about it now, mentioned they were looking at shimming the rear axle or something too. Will report back with what fixed it when its done.

Please let me know. I got some similar issues .

 

[Nyghtryder]

I'd certainly give it a shot, but it had to go to the dealer anyway for the paint peeling off the cab rain rails, so they're looking at this too. If they can't get it I'll do the swap myself.

Whats the paint warranty on these things. I got chips and lill dots completely gone. Not very big but down to the white primer.

 

[Yinzcity]

Whats the paint warranty on these things. I got chips and lill dots completely gone. Not very big but down to the white primer.

Probably depends on your dealer. There is a corrosion warranty, but probably wouldn't cover paint chips. The condition I have is the same discussed in this thread and other members have had this addressed under warranty.

https://www.ranger5g.com/forum/threads/peeling-paint-on-roof.10499/

 

[Nyghtryder]

Mine does this with the stock tune and the loaded tune from SCT. A Performance tune by Torrie fixed mine.
I’m convinced it’s in the tuning.

Until Ford decides to do something, assuming enough people complain through CS I’ll stick with an aftermarket tune.
Maybe Fords own $500 tune option is their intended fix?? I don’t know it the owners of this tune is having any issues but I suspect they are not and Ford does know how to program, why they can’t get it right on a stock truck is beyond me.

500 $ tune ? Whats the tune for ? Sorry I'm new here and just absorbing all kinds of information.

I seen the 850 performance tune that gives you almost 100 more hours through ford performance. I thought that was cool. When was the last pcm update and or trans update put out for these trucks. Curious cause I got a 2020 and if it needs updated I need to get her in there.
Thanks in advance.

 

[Nyghtryder]

Looking at the diagram in the link I provided, it looks like they replaced an assembly. I assume the DPFE is part of this assembly. The service manager told me it is part of the EGR system.

The work order states "faulty DPFE" The other day when I test drove the truck I wrote down exactly what the service manager said: "Differential Pressure Feedback Valve, DPFV"

In Ranger33566's post above, I think he identifies the part, but I got the whole assembly in the diagram he posted.

Sounds like a fancy firs word for EGR valve dont it. Thats whats in the diagram there is an EGR valve. Still damn good info man. Ill check mine.

 

[Nyghtryder]

As an update to try and close the loop here:
I took mine in this morning for this issue. The technician apparently had no trouble discovering the issue on his drives since they didn't have any further questions for me.
They came out of the back with some burnt spark plugs from my truck, where exhaust had been leaking around them and toasting and staining them. Those have been replaced, and on the short drive to work afterwards it seemed to be running and acting better. A few longer drives will tell the true tale, but I'm hoping I'm done with this. At least until after the next 2 years and 50k miles they start burning out again. haha

How many miles did ya have on it there when you needed the plugs???

 

[Nyghtryder]

Follow up: Replaced sensor and that seems to have significantly reduced if not eliminated the bucking at low RPM I was experiencing. Go figure? It was a relatively easy process and the sensor is fairly easy to get to. I used a dremel to cut away the hose clamps on the sensor and replaced with regular adjustable hose clamps. The spring type hose clamps on the other end of both hoses where they hook up to metal tubing are easily compressed with a pair of needle nose pliers. Took me about 30 mins.

For under $20 in parts cost, may be worth giving it a try if you're experiencing the low rpm bucking syndrome.

L

Heck ya man , I'm glad to hear that. I may try it too. Where is it at on this motor. What part did ya get the egr sensor itself or a different part on the gentlemans diagram he posted earlier. Making sure I do it right. Was it noticeably dirty inside or anything ??

 

[kieefer]

500 $ tune ? Whats the tune for ? Sorry I'm new here and just absorbing all kinds of information.

I seen the 850 performance tune that gives you almost 100 more hours through ford performance. I thought that was cool. When was the last pcm update and or trans update put out for these trucks. Curious cause I got a 2020 and if it needs updated I need to get her in there.
Thanks in advance.

Leave everything to the dealer and if you’re still not satisfied with the drivability of your truck, look to the aftermarket or Fords tune.
This forum is packed with factual info and opinions, tread wisely.

 

[Yinzcity]

Well, the truck is back from the dealer, their notes were "performed power balance, #1, #4, dropping intermittently" they checked compression, injector flow, checked fuel for ethanol, and replaced spark plugs. (Which I had already done prior) Passed power balance test after that. Driving home, I don't feel that the problem is any better, but I'll know for sure tomorrow when I do some logging with Forscan. I do feel it's worse when its wet out, so the EGR pressure sensor is looking more and more suspect. Ordered one from Tasca tonight, will see when it gets here.

 

[VegasRanger]

Well, the truck is back from the dealer, their notes were "performed power balance, #1, #4, dropping intermittently" they checked compression, injector flow, checked fuel for ethanol, and replaced spark plugs. (Which I had already done prior) Passed power balance test after that. Driving home, I don't feel that the problem is any better, but I'll know for sure tomorrow when I do some logging with Forscan. I do feel it's worse when its wet out, so the EGR pressure sensor is looking more and more suspect. Ordered one from Tasca tonight, will see when it gets here.

So they gave you the truck back and it's not fixed? Unbelievable. Glad I didn't spend the money on extended warranty with all these dealership horror stories, including mine where they wouldn't check my transmission fluid level because they claimed the 10 speeds don't have dip sticks...

 

[Yinzcity]

So they gave you the truck back and it's not fixed? Unbelievable. Glad I didn't spend the money on extended warranty with all these dealership horror stories, including mine where they wouldn't check my transmission fluid level because they claimed the 10 speeds don't have dip sticks...

I suppose that's one way to look at it. I'm a little disappointed that the problem isn't fixed, but at the same time, I can't fault the dealer for following the diagnostic they're given buy Ford and calling it good when it passes their tests. If I took the truck back to the dealer and asked them to change the EGR sensor, they probably would, but not worth the time to me to do it for a $15 part I can swap myself.

I agree with extended warranties though, always seemed like a bet on hoping something bad would happen. I also prefer to do my own work when possible so I know it's done right.

 

[Willis]

I

I suspect I'm having the same issue with my 2019 Lariat. I get a shutter/misfire around approximately 25-45mph if the engine speed is under 2000 RPM and I apply just a little bit of gas. Easiest to replicate when rolling along a flat road. If I find the right "spot" I can get it to misfire for a few seconds until I change my throttle input or the road changes, but never any codes. Forscan shows misfires evenly across all cylinders, 6-15 counts in a 1/2hr drive. I replaced the plugs and checked the coil connections with no luck. Same with clearing the adaptive trans tables in Forscan. Its been at the dealer since Wednesday, they were able to replicate the issue, they also replaced the plugs without fixing it. Apparently they are talking with Ford about it now, mentioned they were looking at shimming the rear axle or something too. Will report back with what fixed it when its done.

They tried a shim on mine too amd verified it fixed. But as it did not help at all. I went to another Ford dealer and said it was the egr valve and ordered a replacement. Part came in and drove 140 miles round trip a second time to repair, sat an hour then come to find out the part they ordered was damaged. And they said it’s on back order and have no idea when it will be here. That was probably a month ago.

Sponsored