I've been having hard start issues since I bought my truck (3 weeks ago) 2006 f35 CCLB. Anyhow, had all the issues I seem to hear about, long crank when cold, ran like it had a kitty stuck in the intake, shifted hard and late, but was amazing when warm.
being the genius I am, I started buying toys before important things. did the intake, exhaust, leveling kit first. then coolant filter setup, and some of the incredibly expensive Revx. I hoped revx would work the magic I saw on youtube, but no.
Driving to work this morning, I got a check engine light, swung by autozone, "all 8 cylinders, low injector voltage", I had a feeling it may have been a ficm issue to begin with but hadn't gotten around to checking anything out. I'll be doing the FICM solder repair tonight. hopefully all goes well.
PS: I regret buying my 6.0 a bit. But on the bright side, I love fixing stuff, so I guess it's all for the best.