Rough Idle and Smoke after head studs
This is my first post. I have read through hundreds of previous posts with similar symptoms but cannot nail down the problem I am having. I have an 06 F250 with an egr delete, cat delete, upgraded fuel reg spring, and SCT tuner.
Last year I installed an EGR delete kit, a new oil cooler and replaced the STC fitting. I was puking a bit of coolant whenever I towed my 10K trailer and I had some hard starting problems. None of these fixed my problems.
After I puked a gallon of coolant the last time I tried to pull my trailer, I decided to do the head gaskets and studs. I spent a couple weekends putting it all together.
After I got finished. It started up and ran normal after it worked a little air out of the system. I babied it around the neighborhood and noticed the turbo was farting a bit more than usual but figured it needed a little time to "relearn". I pulled it up to 55 with about 3/4 throttle and everything seemed fine until I heard it develop what sounded like an exhaust leak. As I pulled up to a light I noticed it was idling real rough.
I limped it back into my driveway and noticed it was puffing black smoke and running like it was on 7 cylinders. After it cooled down and I restarted it continued to idle rough and was pouring out grey smoke continuously.
I pulled up a #8 cylinder contribution code with AE and an EGR code because I was running it without the SCT tunes (stock only).
I decided to pull the #8 injector. Nothing found. I pulled 2, 4, and 6 as well. None of them showed anything remarkable.
After I did that, I realized I should have done the balloon test. I balloon tested the other bank and saw nothing.
I picked up some new o-rings today and a replacement injector from the dealer today and reinstalled only to have the exact same problem.
I am stumped. The AE shows a low contribution for #8. My IPR and ICP are reading normal ranges. Anyone have any ideas?