Fuel Problems (Logs inside)

Jeyoller · 03-23-2018, 01:07 PM

Hey Guys! Ive been getting weird readings from my JB4 since day 1 but since the car was running "fine" i never mind it. Recently i started on a journey of making more power and that's when i got a bit more into logging and stuff. I cant seem to understand why my LPFP reading is literary nothing and why my HPFP is all over the place..... no codes no nothing on my scans. WOT sometimes hesitates so i've kept my car on Map 4 for the moment. Car runs fine as a daily driver even tho it has given me limp mode 2 times in a period of 8 months because of "electric malfunctions" that went away after a couple of restarts.

Thanks in advance for any help!

Here's a small log and a video of how the LPFP/HPFP looks like

Log:
https://datazap.me/u/jeyoller/log-15...log=0&data=1-4

Video (No WOT just cruising)
https://www.dropbox.com/s/lob981hcnr..._0659.MOV?dl=0

Kevin39 · 03-23-2018, 01:48 PM

As far as I know, the N55 doesn't have a Lpfp sensor so ignore that value.

Jeyoller · 03-23-2018, 02:00 PM

Quote:

Originally Posted by Kevin39

As far as I know, the N55 doesn't have a Lpfp sensor so ignore that value.

What about my HPFP? is it ok for the sensor to be all over the place like that?

weehe126 · 03-23-2018, 02:23 PM

Hpfp is all over the place because it doesn't have any resolution. The sputtering you are feeling is when the hpfp values goes below 9. What fuel are you running?

Jeyoller · 03-23-2018, 02:26 PM

im running 93 octane

weehe126 · 03-23-2018, 05:14 PM

Quote:

Originally Posted by Jeyoller

im running 93 octane

Do you have the FF wires installed for the JB4? One that plugs into the fuel rail sensor.

Jeyoller · 03-24-2018, 09:05 AM

I actually did not since it said it was optional... :/ do you think it might be related?

03-23-2018, 01:07 PM	#1
Jeyoller New Member 13 Rep 29 Posts Drives: E90 335i 2011 Join Date: Feb 2015 Location: Northern Virginia iTrader: (0)	Fuel Problems (Logs inside) Hey Guys! Ive been getting weird readings from my JB4 since day 1 but since the car was running "fine" i never mind it. Recently i started on a journey of making more power and that's when i got a bit more into logging and stuff. I cant seem to understand why my LPFP reading is literary nothing and why my HPFP is all over the place..... no codes no nothing on my scans. WOT sometimes hesitates so i've kept my car on Map 4 for the moment. Car runs fine as a daily driver even tho it has given me limp mode 2 times in a period of 8 months because of "electric malfunctions" that went away after a couple of restarts. Thanks in advance for any help! Here's a small log and a video of how the LPFP/HPFP looks like Log: https://datazap.me/u/jeyoller/log-15...log=0&data=1-4 Video (No WOT just cruising) https://www.dropbox.com/s/lob981hcnr..._0659.MOV?dl=0
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03-23-2018, 01:48 PM	#2
Kevin39 Lieutenant 164 Rep 411 Posts Drives: 2011 E90 N55 Join Date: Feb 2016 Location: Indiana iTrader: (0)	As far as I know, the N55 doesn't have a Lpfp sensor so ignore that value.
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03-23-2018, 02:23 PM	#4
weehe126 Brigadier General 1195 Rep 3,234 Posts Drives: 2017 340i Join Date: Apr 2014 Location: San Antonio iTrader: (2)	Hpfp is all over the place because it doesn't have any resolution. The sputtering you are feeling is when the hpfp values goes below 9. What fuel are you running?
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03-23-2018, 02:26 PM	#5
Jeyoller New Member 13 Rep 29 Posts Drives: E90 335i 2011 Join Date: Feb 2015 Location: Northern Virginia iTrader: (0)	im running 93 octane
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03-24-2018, 09:05 AM	#7
Jeyoller New Member 13 Rep 29 Posts Drives: E90 335i 2011 Join Date: Feb 2015 Location: Northern Virginia iTrader: (0)	I actually did not since it said it was optional... :/ do you think it might be related?
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