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///M3 Forum
The BMW E46 ///M3 is the M version E46 and puts out an amazing 333 HP and 262 lb-ft of torque at stock specs! There are an amazing amount of modifications for both the coupe and convertible models so read up and get started modifying your cars today!

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Old 06-06-2013, 07:34 PM   #1
planearium
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Join Date: May 2013
Location: Hampton Roads
Posts: 56
My Ride: M3
HPF Fuel Pump question

Hey everyone, I just picked up an 02 M3 locally and the previous owner had installed a HPF Fuel Pump. Its a daily driver, and has no other performance mods as of now besides an intake.

Basically what he said was, the fuel pump was made for more power and thats why the car won start up the first time sometimes. But if I simply turn it off, then turn it back on its good to go...Just wanted to see if there is something I can do to fix this everyday annoyance This weekend I plan to check out the fuel filter and possibly replace that, and if that doesn't help, I am looking at getting an OEM Fuel Pump to swap in.

Please forgive my ignorance as this is my first e46; thanks in advance!
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Old 06-08-2013, 11:02 AM   #2
planearium
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Join Date: May 2013
Location: Hampton Roads
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My Ride: M3
HPF Fuel Pump question

No help?


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Old 06-08-2013, 03:04 PM   #3
Alex323Ci
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Join Date: Jan 2005
Location: Huntington Beach -Surf City USA
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My Ride: M3 & 323Ci (sold)
i've seen this posted several times on dedicated M3 forums. not about this (HPF) fuel pump. (which btw HPF went out of business recently). but about the M3 not starting on the first try. some say they thought it was the fuel filter and others thought it was the battery. some say they just turn the key to on first without cranking, then back off and then on and it seems to work. i've seen too many mixed reviews on the fix to this sometime occurance i just don't worry about it.

will wait for others responses.
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Old 06-08-2013, 03:22 PM   #4
Sinful7
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new pump, you need to prime the system.. cycle the key a few times.. you might have to crank it for a few extra seconds to build the pressure back up.. if that doesnt work I will look further for helping you out. Im in a strange boat right now too, so I can relate! But HPF is out of business last I heard (above stated it too) but a fuel pump is a fuel pump.. If you replace it you relieved all pressure, and it needs to build back up.. However it shouldnt take long to do that tho..
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