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Power Strokes
6.0 Tech
Cleaned HFCM, now losing FP
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[QUOTE="6speedsd, post: 1304350, member: 1242"] Ok, I'm back on this. I'm about ready to pull what little hair I have out. So far, I've done this.... Tried a new cap and O-ring....no change New o-ring on upper filter cap....no change Took a hand pump and lightly pushed air through the feed line, back to the tank....no change (trying to rule out restriction) Pushed air up the feed line to the upper housing....no change (again, ruling out any restriction on the engine side) ----when I did this, I had the upper filter out, and the cap just threaded on a couple turns. Once I started pushing air, after just a bit I heard it bubbling in the tank. Only place it could get there was through the return, so it apparently was pushing air through the entire system.) Lastly, replaced the HFCM with a used one...swapped on my new pump and a new filter cap with my used filter. Again, no change. Didn't expect much, but I was out of ideas, and willing to try anything. Those are Motorcraft filters. Don't see where a filter would cause this issue though. I'm seriously at a loss now. Only thing left is my friggen regulator, which is only about 3mths old (Aeromotive). At idle, pressure is fluctuating from 63 to 60....needle constantly moving. Does the same at a cruise going down the road. Fluctuates 2-3psi. I have 2 gauges on my regulator with a T....the mechanical one and the sending unit for the electric one in cab. Mechanical one even fluctuates a little at idle. Not sure what could be at fault with the regulator that would cause this. Sent from my iPad using Tapatalk [/QUOTE]
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6.0 Tech
Cleaned HFCM, now losing FP
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