yes. Left coast has dine a balance test twice.... if o rings were jacked, would this show on a balance test? Sticking spool valve? Cleaned EBP tube and shot some maf sensor cleaner up elbow towards sensor, not sure If I should have done that but ran out of day light last night. Any way of checking if sensor is bad?

 

With a scanner yes. That's how I diagnosed mine at first.

I would go over every electrical harness you have with a fine tooth comb. Look particularly good over any of the harnesses' going in or out of the FICM area and towards the injectors.

 

middle plug on ficm, missing one of the snap locks on it.. so it locks on only one side. Posibility?

 

Definitely.

 

I have the same problem with my power stroke. intermitten surg of engine and rough idle, runs fine at freeway speeds but acts up around 45to 55.

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Mudwieser, if you find out what the problem is please let me know

 

I hope he found it out, this thread is almost a year old now.

Seriously, I would like to know the outcome too, but you might be better off starting your own thread to get more responses pouter person! Welcome to DB!