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Old 07-20-2012, 07:48 PM   #6
OEM ///Member
Join Date: Nov 2009
Location: Fairfax, VA USA
Posts: 22,454
My Ride: 330CiC, M5, X5, E93
Well with a supercharger fuel pressure/volume is crucial, especially under boost conditions.

Leaning out too much would be a catastrophic event for your engine.

Did the ESS kit include/suggest upgrading the fuel pump anyway?

What is the age of your fuel filter?

Pop the bottom rear seat and see if the soundproofing on the passenger side has ever been cut. If not, your pump is original.

OEM pump is only about $120 from
Solve your misfires, lean codes, rough idle -

Fuel pump failures -

Temp Info -

Hidden OBC Menu - Check Voltage, Temp, Fuel Level -

E46/E39 GM5 Door Lock Info -

Lower hose temp switch O-ring - BMW #13621743299
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