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No power and Blue smoke... but only sometimes
I have an ’05 F250 6.0L and periodically (maybe once every 2 days) when I try to accelerate from a stoplight it will just bog down and barely move, won't go above 2000 rpm and, there will be a cloud of blue smoke coming out the exhaust. I have put it in neutral and revved the engine and that seems to make it “snap out of it” and return to normal operation. Its almost like a light switch is being turned on. One second it can’t even move and its billowing blue smoke, the next its running 100% and has all the power in the world.
Any Ideas? A buddy of mine said that next time it happens to unplug the EGR valve and see if that fixes it. Unfortunately/fortunately every time it happens it has gone away in a matter of several seconds. If it does it again I may unplug the EGR valve and drive it like that for a week or so seeing if it repeats. Is this a good idea?
I am not incredibly familiar with the turbos that are on these 6.0L’s but I do remember somebody saying they are variable geometry so to allow them to spool quickly and run as effectively as possible. Would this symptom I am seeing be consistent with a failure of the turbo actuator? (if there even is such a device) If there is no actuator, what controls the pitch in our turbo inlet guide vanes?
I have not noticed any repeatable circumstances that bring this situation on (some days its hot outside, some days its cold… etc.) I have also not noticed what the turbo was putting out when this occurs. If it occurs again I will be sure to see if i'm getting any boost at all.
THANKS FOR THE INPUT!!