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Power Strokes
6.0 Aftermarket
Slightly dropping fuel pressure
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[QUOTE="04cr450, post: 1282332, member: 12074"] Sounds like a weak hfcm.. replace it.. fwiw- I have the 6.4 pump as a lift pump feeding a new oem hfcm. Holds 205/75's on a Race tune. That being said, I had a bone stick fuel system on 175/75's and it held fuel pressure with the blue spring. No need to upgrade your fuel system other than a fresh hfcm. [/QUOTE]
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