I'm lost again. fpr still sueeling afer stuff?

[turbojonn]

My other post has the details. I'm a bit lost. Could the fpu be bad? The pump? How do you diagnose? Any help GREATLY appreciated.


UPDATE JULY 2006: Rebuilt the fpr. Waiting for new rubber piece to replace existing piece. The fpr now works, but it is still squeeling after the fuel pressure boosts way up and then comes back down. Might be the rising rate needle valve clogging? I think that a replacement needle valve is coming in the official begi rebuild kit that I ordered. I'm sticking with the .010 shim though. They are sending out .003 shims in their kit. They say to use two of them.Sounds like they know it's a weak link. You guys have saved me alot of hassle. Thanks much for your help.



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[Darkside]

it sounds like you have a bieg fmu. my shim went bad and i lost my head gasket last spring. this is when we discovered the shims were .003 stock. We replaced a number of shims in different units with .010 galvonized steel that you can purchase at home depot as galvonized roofing. I bought a roll for like $5.00.
The out side of the package said .010...........
Cut a piece to 11/2 inch square.
take the fmu out. block off the supply and return lines .split the fmu at the bottom ,you will find your shim and a reusable gasket. replace the shim and reassemble . CHECK YOUR FUEL PRESSURE before restarting bike adjust accordingly. I have put 4500 miles and run a ten pound boost spring and have not had a problem since doing this.
If you dont think you can find stock email me at ktaylor@new.rr.com i will send you a piece.