need help on reading

[1iwilly]

hello to all
need help how to interpret this all the sudden i've seem to run out of gas when gauge read 1/4 left i took out the assembly on the dr side syphon pump seems to look ok i disassemble it put in new oring but it seems to be hit and miss have a old faithfull 5 gal jug for back up here is the info when doing option 6 on cluster=TNK=28.3/2.7/31.1L
which is right side and left side and what should i look for when i get close to 1/4 tank. also is there a way to test the syphon pump.thanks

[Qsilver7]

What does it say on TEST 6's 2nd screen...PHASE 1,2 or 3?

[jfoj]

Likely your fuel pump is soft and going to fail soon. Soft failing fuel pumps cause the passive sucking jet pump to not transfer fuel efficiently enough.l

Easy to monitor the fuel level using the Hidden OBC Menu. The drivers/left side of the tank should never have more fuel than the passenger/right side below 1/2 tank unless you have cornered very hard to the right, but the drivers/left side should go to empty/0.00L very quickly.

Suggest you repalce the fuel pump now, before you are stranded. Keep the fuel tank between 3/4-1/2 full until the pump is replaced.

Read this - Save yourself up to $200 and some headaches - Electric Fuel Pump PM - E46Fanatics

[1iwilly]

sorry about the delay 1st thing on that page says about softfail pump wouldn't the fuel pressure start dropping a tad if is the start or softfail.
right now on option 6 TNK=27.8/2.3/30.2L- TNKNZ=30.7L PHASE-1

[jfoj]

It looks like from those values that the Drivers/Left side of the tank has way more fuel than the Passenger/Right side.

Pretty classic soft fuel pump problem. Soft pump drops in pressure and volume.

You need to find a empty parking lot and do some Counter Clockwise Donuts to shift fuel to the Passenger/Right side of the tank.

Although the part number is different for the complete pump/sending unit assembly, I assume the actual pump may be the same as the E46.

I do not trust the German car fuel pumps after about 8 years, I just replace them.

[1iwilly]

thanks i'll start looking into trying to find just the pump doing dr front cv axle this week.also wouldn't clockwise turns leans the pass more to the ground so then the fuel transfer to pass from dr side instead off counter clockwise.???

Originally Posted by jfoj

It looks like from those values that the Drivers/Left side of the tank has way more fuel than the Passenger/Right side.

Pretty classic soft fuel pump problem. Soft pump drops in pressure and volume.

You need to find a empty parking lot and do some Counter Clockwise Donuts to shift fuel to the Passenger/Right side of the tank.

Although the part number is different for the complete pump/sending unit assembly, I assume the actual pump may be the same as the E46.

I do not trust the German car fuel pumps after about 8 years, I just replace them.

[jfoj]

I would replace the entire fuel pump/sending unit rather than tying to swap just the pump in the sending unit.

Also just keep the vehicle above 1/2 tank until you get the fuel pump replaced.

[1iwilly]

thanks will do will have to wait until nov or so oct 21 taking the auto train from FL to VA then driving 6 hours to CONNECTICUT for work
by the way where can i get the best price and good quality unit.??

Originally Posted by jfoj

I would replace the entire fuel pump/sending unit rather than tying to swap just the pump in the sending unit.

Also just keep the vehicle above 1/2 tank until you get the fuel pump replaced.

[jfoj]

Use BMW Parts Catalog to get the part number.

Check BMA Auto Parts and use SPECE30 is 5% discount, they ship quick and often have good pricing, but also use this tool to check other suppliers and dealers - BMW Part Number Price Comparison for Windows & Mac

[1iwilly]

thanks a million and thanks for the help full replies

Originally Posted by jfoj

Use BMW Parts Catalog to get the part number.

Check BMA Auto Parts and use SPECE30 is 5% discount, they ship quick and often have good pricing, but also use this tool to check other suppliers and dealers - BMW Part Number Price Comparison for Windows & Mac