Cam retarding...help
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Cam retarding...help
Ok, so I have 150k on my 05 with the 5.4 and have been through the same issues as everyone else...cam phaser knocking for over 100K miles, coils going out, low rpm shake and shudder, loss of oil pressure, catalytic converter clogging up due to a stuck injector...the list is long but this one has me stumped. Last week the truck started popping and wouldn't hardly run, it felt alot like when the catalytic converter clogged up so did a backpressure check and everything looked good. Took it to a dealership and they hooked it up and said the drivers side bank cam was retarding 55 degrees and that the cam phaser must have been shot. I put a new cam phaser on it yesterday and the knock was gone, the quietest the engine had been in over 100k miles but the truck still ran the same, problem not fixed. The engine shakes terribly at idle if it does idle and will smooth out on the highway but has no horsepower. Its constantly changing and sometimes won't hardly accelerate at all and other times is ok but no where near where it was a week ago. My thoughts are a possible oiling problem to the sensor on that bank, not allowing the vct sensor to make the changes to the timing...any other thoughts?
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Problem fixed!! Pulled the VCT solenoid out to check for a clogged screen and noticed a hole in one of the screens. Got to looking closely and noticed the missing piece of screen was lodged between the plunger and the body. Removed the snap ring, pulled the piece of screen out and went ahead and cleaned the plunger and everything, put it back together and the truck runs good as new.
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