Got 99 problems and my Gen 1 is 1

[2011reptar]

I had a ford 351 doing what you described and it was the timing chain tensioner.

Did you have chain slap or anything else associated with it?

 

[New recaros]

This is what I see after a 5 mile drive and idling for about 15 mins.
View attachment 473171


And this is what I see after holding the idle at 1300Rpm for about 3 mins. Nothing close to setting off a light, but clearly missing more on cyl 6. I have swapped plugs, coils and wires twice and nothing new. Lt Fuel trims as low as -8.

View attachment 473172

If you look at you first data chart and compare the misfired cylinders to the firing order you will find your answer.
It shows every other cylinder is misfiring.

 

[New recaros]

https://www.fordforumsonline.com/threads/identifying-and-understanding-ford-ignition-systems.3764/

 

[2011reptar]

Okay, so I guess this is “solved,” and the first shop was right after all.

I drove two more Gen 1s today and they both had the same shaking shuddering idle mine does. I only got to hook Forscan up to one and it also produced some minor misfires, so that checks out to be “normal” as well and is why ford has a threshold before it sets off a light. One only had 30k miles and was a 2014, one had 88k and was a 2011. I guess it is truly the cam profile of the 6.2 specific to the raptor. It’s the only difference between our 6.2 and the 6.2 in super duty.

I will be looking to a tuner to raise the idle a little so it doesn’t dip so harshly as I’m just not comfortable with it.

I can definitely live with the shake, I just thought something was wrong with the truck, but lesson learned!

I will update this thread if it turns into anything else as I’m still getting a weird occasional pop from the driver side exhaust that makes me think it’s running too rich. But anyway, thanks everyone for the suggestions and advice!