KnoxE55amg

Anyone know fuel pressure at idle and at throttle on 2006 E55? Having start up issue son my 2006. Car is holding 84psi in rail and won't crank right up. After a few days in garage pressure bleeds off and cranks on first try. Didn't happen till after fuel tank recall?????

bbirdwell

80 psi +/- 3 psi is in the ballpark.


Pressure will bleed off within 24 hours to single digits.


My experience with my car with fuel pressure gauge connected 24/7 for several weeks while troubleshooting.


YMMV.

SICAMG

Yep ...75-80psi. Just to show you that the factorey filter is and becomes a bigger restriction on the pump....when I pulled mine out and iliminated it then whent to an inline filter, pressure jumped right up to 78psi from 65 psi. Big difference.

shardul

iTrader: (1)

78 to 85 psi at idle

jmb614

Does fuel pressure drop during acceleration, Shardul? To like 65 psi? Is there a way to measure fuel pressure if you have a looped rail?

KnoxE55amg

Thank you guys. Pressure seems to be good then. Tune issue? Tried everything I know to fix. Even has new CPS installed????