Just back your preboost out some more. Mine doesn't touch the diaphram.
You might just need to slide the housing back some. If its too far forward, nothing you do wil clean up the bottom, at least on my pump that's the case.
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RIP DEX
2001 2500 2wd
Diesel pro's cam
Walbro 392
Goff diesel injection
160hp pump
6x.013's by Weston
HTT 62/71/13 over FI 82/92/1.10
Levi's turbo blankets!
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