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Old 07-20-2012, 08:14 PM   #8
Lemonsqr
Registered User
 
Join Date: Sep 2003
Location: Chicago, IL
Posts: 3,133
My Ride: 2001 TiAg 330i
Quote:
Originally Posted by jfoj View Post
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 bmaparts.com.
No fuel pump upgrade available or recommended by ESS.

Fuel Filter is only a couple of years old with at most 10K miles.

Pump is original since I was the second owner at 12K miles
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