Blue spring brass question

[TowGuy2003.6.0]

Just read an old thread about guys having issues with the brass fitting to tight and causing fuel pressure issues. I did the same install and am now having a jerk miss issue at low rpm's 1/4 to half throttle then when you mash the peddle its like nothing happens. I've replaced 1 injector that threw a code and still same issue. Also replaced all o-rings on the pass side so far. Others next week. Have good oil pressure and all read fine when hooked to the lap top at the local diesel shop. Can someone attest to this issue? ? Please someone

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[TowGuy2003.6.0]

Bump....

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[Karls03]

I know its a PITA, but have you tried swapping back the OEM spring to rule out the Blue Spring as the issue? I had a Gillette spring for 2 years and just swapped to the Blue spring, no issues either way.

Have you tested your FICM for proper voltage? Even when I was leaking fuel from under torquing the fuel psi gauge I never had what you're describing.

[TowGuy2003.6.0]

I had the ficm tested at the local diesel shop and everything was fine. The icp,ipr, ect. Everything was by the numbers. Can someone tell me I loosened the bolts that hold down the oil filter housing but without removing the oil filter or its cap. Should I pull the cap and make sure I didn't mess anything up by doing that way. I remember it made a fairly loud pop when I started tightening the torx bolts down.....???? And I haven't tried putting the stock spring or brass cup back in but I think I'll try Monday when I get back to the shop.

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[TowGuy2003.6.0]

And I can have the stock spring installed in 10 min. Not to big of a PITA

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