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      09-17-2012, 01:31 PM   #26
JamesM3M5
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Drives: E28 M5, E92 335i
Join Date: Sep 2011
Location: Northern VA

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Quote:
Originally Posted by drewmeyer87 View Post
Shiv, you said "Replace your stock lpfp", do you mean with another stock one or is there an upgraded one? I get maxed fuel trims and limp modes just running 30% e85, I'm fairly certain my LPFP isn't up to the task.

Anyone know the BMW Part number for LPFP?
16 14 7 163 298 Pump with level sensor (inside passenger side of the tank), $333.88 retail, less from online BMW parts dealers such as getbmwparts.com.

16 14 7 163 296 Fuel pressure regulator with filter (inside driver's side of the tank), $244.42 retail.

If the LPFP doesn't cure it, it may be a clogged fuel filter and/or bad pressure regulator. Try just replacing the pump unit, first, then if you still have problems (haven't seen any reported problems with the fuel filter/regulator unit yet) then you may need to replace that unit as well. The filter and regulator are together inside the tank, no more external fuel filter like older cars.
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