Thread: HPFP swap
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T_H_O_M_A_S T_H_O_M_A_S is offline
Junior Member
Posts: 150
Join Date: Oct 2017
Car: M135ix
Default 03-01-2019, 07:52 AM

i guess its just the way the dme controls the supply valve ,
but the one thing you cant control when you do a swap , is position of the camshaft driving the hpfp , is either bottom , top or somewhere in between.
you'll notice right away when unbolting the hpfp . you could move the crank a little to make sure its at bottom point otherwise you have to compress the spring while fastening the two bolts , oh and do them half a turn at once alternating between the two .

M135i PWG , FBO , PS2 , LPFP st2 , HDP6 custom for N55 , wedge MHD mapping , XHP AT8
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