what SHOULD my fuel pressure be?

acarr6 · 10-11-2023, 08:10 PM

Haven’t been able to find a definitive answer regarding fuel pressure.

When I prime the fuel pump initially, the pressure sits at about 75 PSI (5.5 bar). When I start the car it jumps to about 84 psi (6 bar).

After I shut the car off, after about 2 hours it drops to 60 PSI, then after 14 hours 45 PSI. Finally after 18 hours it was at 39 PSI.

spammysammich · 10-11-2023, 08:32 PM

i was getting around 5-5.5 bar at idle last time I looked. It would drop to about 3.5-3.7 bar at WOT but I can't be sure. I didn't log anything, just quick looks at my phone with BimmerLink.

10-11-2023, 08:10 PM	#1
acarr6 Lieutenant 408 Rep 584 Posts Drives: E92 M3 DCT Join Date: Aug 2012 Location: GTA iTrader: (1)	what SHOULD my fuel pressure be? Haven’t been able to find a definitive answer regarding fuel pressure. When I prime the fuel pump initially, the pressure sits at about 75 PSI (5.5 bar). When I start the car it jumps to about 84 psi (6 bar). After I shut the car off, after about 2 hours it drops to 60 PSI, then after 14 hours 45 PSI. Finally after 18 hours it was at 39 PSI. __________________ *** 2011 M3 DCT * Built 4.4L Stroker * Gintani supercharger * Brembo GT * BBS FI * OHLINS * Nardo Grey ***
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10-11-2023, 08:32 PM	#2
spammysammich Major 1584 Rep 1,104 Posts Drives: 2009 E92 M3 Dakar Yellow II Join Date: Oct 2021 Location: Edmonds, WA iTrader: (0) Garage List 2009 BMW M3 [10.00]	i was getting around 5-5.5 bar at idle last time I looked. It would drop to about 3.5-3.7 bar at WOT but I can't be sure. I didn't log anything, just quick looks at my phone with BimmerLink.
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