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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 01-15-2013, 08:48 AM   #1
Jgmacho
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Join Date: Jan 2013
Location: Texas
Posts: 5
My Ride: 325i
Aftermarket fuel filter and regulator install on 325i

Car has new fuel pump. Original fuel pump was failing on initial engine starts. Installed an Aeromotive fuel pump and is currently overrunning OEM FPR. Converting stock system with AEM regulator and Holley inline fuel filter. Putting fuel system back to stock fuel pressure and will meet the needs of my supercharged engine. Will post pictures when my install is complete
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Old 02-24-2013, 03:05 AM   #2
Edgar3498
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Join Date: Aug 2012
Location: Oceanside CA
Posts: 132
My Ride: 330CI
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Old 02-28-2013, 07:08 PM   #3
Jgmacho
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Location: Texas
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My Ride: 325i
Well I guess this is not really a DIY but it is fairly simple. I removed the stock system and ran my own braided hosed lines. On this particular regulator I found out the hard way that the return line to the tank is on the bottom. The manufacturer ,AEM, calls it the output line. Well I got confused. I ended up using the silver flow nut that came with the regulator. It came with three black, silver, and gold. Gold is the biggest. It can be adjusted to over 100 psi. I kept it at 50-54 psi. I liked this regulator because it it regulates my aero motive pump. My stock one didn't. For the parts that are hard fuel lines I clamped a barbed -6an fitting using a rubber fuel hose. That allowed me to use my braided fuel lines. On one pic of my fuel rail you can see that set up. I ended up using a smaller length filter because any bigger than stock you couldn't put splash guard on. Car runs excellent. My fuel pressure is right on with stock specs.
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