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Old 05-16-2019, 01:22 AM   #1
Atomic Wrx
Scooby Newbie
 
Member#: 492722
Join Date: Oct 2018
Vehicle:
2018 WRX
WRB

Default Does a new Fuel pump need a tune

Background i have a 2018 wrx,
So just last week i installed full TGV Deletes and egr deletes and a new dw300c fuel pump. Everything looks fine car doesn't seem to starve and fuel pressure builds to above 2k. I have the car tuned for tgv and egr deletes so everything is working fine.
My only question is that ive been looking at my fuel pump duty % and there off instead of being a 100% at start up there 88 and instead of idling at 33% it dose at 77%. Is this due to the fact the car need to be tuned for it or the fact that the pump isn't getting enough amps to fully open the system.
Thanks for any help
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