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Old 11-20-2012, 01:07 PM   #463
jfoj
Registered User
 
Join Date: Nov 2009
Location: Fairfax, VA USA
Posts: 11,542
My Ride: '06 330CiC, '03 M5
Been a long time since I replaced an E46 fuel pump, but on my E39 M5, the pump had to be seated correctly as there was a round pipe with an O-ring that came from the left side siphon pump as I recall?

Is there anything like this on the E46?

Also as for fuel levels, usually once the composite tank level(s) get to about 1/2 tank, the left side of the tank pumps down quickly due to the siphon pump and usually should be empty except due to hard cornering, then the tank pumps down very quickly again.

Use the Hiddern OBC Menu link in my signature to figure out if you are actually transferring fuel from the left side of the tank properly.
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Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616

Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temps, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose fan switch O-ring - BMW #13621743299
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