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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > Fuel Pressure and Fuel pump



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      03-02-2018, 04:59 PM   #1
CurtisP87
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Fuel Pressure and Fuel pump

I scanned my car for codes yesterday (no CEL light, was just scanning to keep an eye on things) and I got two codes that make me think my fuel pump is about to kick the bucket:

2BDE and 2BF0

But, I logged a few pulls on Monday night (specifically to check on my fuel pump, because I was thinking about trying the e30 map) and my rail pressure seemed fine under WOT...it dips down to about 1000 psi at idle/very low throttle, but during a pull it never drops below 2000...

A log I made today, stage 0 map, normal acceleration from a stop light to about 40mph: https://datazap.me/u/curtisp87/log-1...og=0&data=9-18

A log from Monday night, stage 1+, 2nd thru 4th gear WOT: https://datazap.me/u/curtisp87/log-1...=0&data=3-6-14

Another from Monday, stage 1+, 3rd gear to redline: https://datazap.me/u/curtisp87/log-1...=0&data=3-6-14

Anyone have any thoughts here? Should I be planning on a new HPFP soon? The codes haven't returned since I flashed back to stock last night, but I also never tried any WOT pulls or anything since seeing the codes.
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      03-02-2018, 05:31 PM   #2
crossface007
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Quote:
Originally Posted by CurtisP87 View Post
I scanned my car for codes yesterday (no CEL light, was just scanning to keep an eye on things) and I got two codes that make me think my fuel pump is about to kick the bucket:

2BDE and 2BF0

But, I logged a few pulls on Monday night (specifically to check on my fuel pump, because I was thinking about trying the e30 map) and my rail pressure seemed fine under WOT...it dips down to about 1000 psi at idle/very low throttle, but during a pull it never drops below 2000...

A log I made today, stage 0 map, normal acceleration from a stop light to about 40mph: https://datazap.me/u/curtisp87/log-1...og=0&data=9-18

A log from Monday night, stage 1+, 2nd thru 4th gear WOT: https://datazap.me/u/curtisp87/log-1...=0&data=3-6-14

Another from Monday, stage 1+, 3rd gear to redline: https://datazap.me/u/curtisp87/log-1...=0&data=3-6-14

Anyone have any thoughts here? Should I be planning on a new HPFP soon? The codes haven't returned since I flashed back to stock last night, but I also never tried any WOT pulls or anything since seeing the codes.
yup. HPFP on its way out. Have one on standby and ride this one out.
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