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Fuel filter restriction code anybody get this code on an 07 ISX

Ok so I got FASS put on and relatively close if not the same day I got an initial High fuel pressure code which I cleared and never say again and a fuel filter restriction code which says moderately sever warning which constantly appears. I am also getting flashing RED light/ check engine light when I turn key off and on but disappears once I drive until I cost past 65mph check engine light comes on again. Anybody come across this before or have any suggestions?

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I had my fuel lines replaced just about a year ago and mechanic wanted to shorten fuel lines so I can pickup few extra hp(he said about 30hp) but other mechanic said that I would get high fuel pressure code. It would only work on older, mechanical engines not on ISX. Maybe the fuel line coming out of fass filter going to the engine is too short.

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Nick Spitzer will be eternally grateful.
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