This is a very timely review of this system for me as I have a replacement pump ready to install into my 113K mile E53 4.4i

I ran Test 6 on a 20 mile highway drive today and say right tank levels in cruise rang8ng about 2.0 liters to 3.8 liters. During some braking and turns I saw as low as 0.5 liters and was pretty freaked out but all kept running fine and the right tank numbers recovered.

I currently have about 26 liters total in test 6 and started my trip with about 30 liters.

I’ll be opening up the left side of the tank to evaluate my siphon jet pump but wanted to get an opinion on whether my current test 6 values show anything amiss in the Jet pump.

Thanks in advance to you guys who have dug deep into this system and provided excellent photos of the areas involved.

Mike

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Mike
Dallas, TX & Appleton, WI
2003 E53 4.4i Pearl Beige
2003 E46 330Xi Monaco Blue
2007 E90 335Xi Black Sapphire Metallic
2011 F25 X3 28i Black Sapphire Metallic