I'm still following the forum with you guys; I been towing with mine and driving it a lot lately and it's actually been really good yet. However, sometimes it seems weather related (which makes no sense transmission wise) where I feel a bit of shudder. I still think my coils helped the situation so I don't know if there is some degree of programming with the fuel mapping (some have mentioned) that could also be alongside the transmission issues. Running premium fuel and having it run better doesn't point at the tranny I wouldn't think. But who knows, I really am hoping you guys get some closure as I have enjoyed driving mine now lately. I went up north last weekend (towing the XP4) with a friend (his brother and another buddy) that has a 2021 Ram Hemi and he was so impressed with the truck towing and comfort wise I think he may even consider buying one. I did not tell him about all these issues of course lol but he's had a few things go wrong with his as well. He's towed my same setup with his last year and it did not handle the load as well by far.... off topic......sorry. I might stop at the shop and check what TSB's they performed if any because I can't remember. I'm really hoping Mossey can get ford to look at his truck one on one with an engineer and get something done.

Shudder under load
 

It would be interesting to see a truck that currently has the shudder issue and to see if a tune would change anything?

Direct Fuel Injectors
 

I have a 2018 Ford F-150 5.0 Coyote that was having this issue. I changed plugs, all coils packs (with VDP), Bank 1 O2 Sensor, Intake Manifold, upper fuel injectors, Sending Unit (in tank) and High Pressure Fuel Pump, the issue still persisted. My symptoms were at high RPM, above 4500 and in the higher gears (> 5th gear). The truck would shudder, then misfire (p0300, p0303).

My issue was 1 direct fuel injector (cylinder 3), the fuel injectors under the intake manifold. So there are 8 fuel injectors on the upper fuel rail and 8 under the intake manifold. It's a 2 fuel delivery system.

Cylinder 3 fuel injector was total dud. Tested it and the other 'direct' fuel injectors and cylinder 3 was delivering no fuel.

It took my son and I 3 hours to remove the intake manifold, pull both lower fuel rails and test all the injectors.

These were the only codes that the truck would throw, P0300, P0303.

Good luck to all those working through this problem! My truck has probably too many replaced parts, but is ripping after replacing 1 direct fuel injector.

I still haven’t decided if I want to spend $500 on new coils to see if I get lucky as some have. I’ve tried running a couple of tanks of premium fuel and checked misfires, and I’m still getting a similar amount as with 87 octane. Maybe I’ll try checking plugs and reseating coils to see if it helps, but after that I guess I’ll just live with it.

What bugs me about the whole response from Ford about the behavior being normal is that normal does not always equal acceptable in a customers eyes. We all know it’s a cop out on their part. And even if a few people jump ship to another brand, they know they’ll still bring in new buyers and sell a million of these vehicles anyway.

Agreed, most manufacturers have a threshold of items that either fail or barely pass “acceptable standards”. It is easier to pass it off as normal than have a massive recall that will cost them millions. And if it is happening with GMC I wonder if they have the same tune.

I’ll certainly provide another update when I get the last three coils installed. I plan to continue using 87 octane until I can test it with the new coils.

Yeah, the “normal characteristic” thing from Ford doesn’t make any sense. If it was normal, all F-150s would shudder.

I installed the last three new coils on my truck today. The plugs and all the coils have now been replaced. I took a good long drive today on state highways, in small towns, and on the Interstate. At first, I thought there was some improvement, but after a few miles, I realized there was little to no change. I filled the tank with premium fuel near the end of my drive. I'll be running premium for the remainder of the time I own this truck. If it behaves like it has in the past, the premium fuel will reduce the frequency and harshness of the shudder, but it will still be there.

The dealer's position is that the truck has a transmission problem. Ford's position is that the shudder is normal. My position is that I have invested all I plan to in this truck. Here we are. Guess I'll be looking for another truck.

I know this is an old thread, but I can confirm that this is a known issue and Ford sees it as expected behavior. My 2015 did it off and on, my brother and father's 2018's both do it, i've had loaner/rental 2019's and 2020's do it... i'm curios to see if my 2023 i'm about to get does it.

Like others, I speculate it has to do with the PCM programming to try to save fuel and get better MPG.

Can't blame you much Mossey, I have been using mine ALOT lately and I think there is still some shuddering going on but it is tolerable since the coil change. I appreciate all you've reported on this issue, I have 10,000mi on mine now and I would say 60% towing, but either way there is some issues somewhere whether its tunning or whatever. I still wonder if the livernois tune will take care of this, I hear that is a great tune for these trucks, however the point is.........we shouldn't need to tune the truck...sad sad deal.....

Let us know your next steps, can't say I blame you and I hope your new truck doesn't have the issue. I was hauling about two ton of sand today in my utility trailer and I have learned to love the gearing on the 10 speed, especially the reverse as it's so much lower than my 99 Super Duty.... But anyways...off topic.......keep us posted sir...

Have they done anything to rectify it? And has the shudder caused anything else?