N55 Fuel Issues Stalling at 1/4 Tank

thejeremyman9 · 07-22-2020, 05:42 PM

Quote:

Originally Posted by TerryGTX

yea, on FCPeuro, i was able to find a part in fuel system- it’s called “sucking jet pump” which passively transfers the fuel from driver side to passenger side where the LPFP locates.
So my friend Steve changed his LPFP HPFP and new EKP module...and stil having the same issue. However, there were few time where he was able to slosh the fuel by agreesive left-and-right steering to save the car from stalling.

I understand the concept but the "sucking jet pump" part you linked previously goes under the hood and connects to the CP. It doesn't transfer fuel between the tanks...?

https://www.fcpeuro.com/products/bmw...38#description

I still have not seen any part that actually transfers the fuel, but im sure one has to exist as the transfer happens somehow.

TerryGTX · 07-22-2020, 05:46 PM

Quote:

Originally Posted by thejeremyman9

Quote:

Originally Posted by TerryGTX

yea, on FCPeuro, i was able to find a part in fuel system- it’s called “sucking jet pump” which passively transfers the fuel from driver side to passenger side where the LPFP locates.
So my friend Steve changed his LPFP HPFP and new EKP module...and stil having the same issue. However, there were few time where he was able to slosh the fuel by agreesive left-and-right steering to save the car from stalling.

I understand the concept but the "sucking jet pump" part you linked previously goes under the hood and connects to the CP. It doesn't transfer fuel between the tanks...?

https://www.fcpeuro.com/products/bmw...38#description

I still have not seen any part that actually transfers the fuel, but im sure one has to exist as the transfer happens somehow.

The sucking jet pump does passively transfers the fuel according to my understanding. If you check the diagrams, the LPFP creates a negative pressure so the fuel in sucking jet pump could flow.

zole2112 · 07-23-2020, 09:04 AM

I had similar issues with mine, ultimately it was the HPFP. I changed from my Stage 2 LPFP back to the stock LPFP and it was good for about a day so I thought that was it but then it happened again. After changing the HPFP last fall I haven't had an issue since.

The first instance stalling was going about 25 mph along with a low pressure code, I forget what it was. This led me to change my LPFP back to stock, I've had lots of practice so I can change in in like 15 min lol. After that I had it stall at highway speed along with a high pressure code, then I replaced the HPFP which fixed my issue.

TerryGTX · 07-24-2020, 01:16 AM

Quote:

Originally Posted by zole2112

I had similar issues with mine, ultimately it was the HPFP. I changed from my Stage 2 LPFP back to the stock LPFP and it was good for about a day so I thought that was it but then it happened again. After changing the HPFP last fall I haven't had an issue since.

The first instance stalling was going about 25 mph along with a low pressure code, I forget what it was. This led me to change my LPFP back to stock, I've had lots of practice so I can change in in like 15 min lol. After that I had it stall at highway speed along with a high pressure code, then I replaced the HPFP which fixed my issue.

Which HPFP did you go with?

zole2112 · 07-24-2020, 10:40 AM

Quote:

Originally Posted by TerryGTX

Which HPFP did you go with?

I just went stock, if the Dorsch would have been out I would have probably done that. https://www.fcpeuro.com/products/bmw...4231kt#fitment

peacebomber · 05-04-2021, 07:13 PM

Quote:

Originally Posted by TerryGTX

yea, on FCPeuro, i was able to find a part in fuel system- it’s called “sucking jet pump” which passively transfers the fuel from driver side to passenger side where the LPFP locates.
So my friend Steve changed his LPFP HPFP and new EKP module...and stil having the same issue. However, there were few time where he was able to slosh the fuel by agreesive left-and-right steering to save the car from stalling.

did he change his tank? or fix this problem

TerryGTX · 05-26-2021, 10:09 PM

Turned out to be his LPFP. He replaced with a new one. Also his cleaned fuel tank might also play a factor here.
Well...for me my solution is to keep my fuel always above 1/4 tank. Puzzle solved.

n55david · 05-26-2021, 10:11 PM

so I recently had this issue. wasn't the fuel pump fyi. however replacing it would fix the problem by association.

harshil102 · 07-31-2024, 12:58 PM

Quote:

Originally Posted by n55david

so I recently had this issue. wasn't the fuel pump fyi. however replacing it would fix the problem by association.

So what was the issue actually? Why the mystery lol

n55david · 07-31-2024, 01:00 PM

Quote:

Originally Posted by harshil102

So what was the issue actually? Why the mystery lol

Was the level sensor on the pump assembly..

cwolfe12898 · 12-14-2024, 08:59 AM

Hello all, I recently have been having this same exact issue as OP. Here’s the story. In June this year I took my 2013 335i drive that I recently purchased to a bmw dealership do a general inspection to make sure nothing was wrong. They informed me that my vehicle had an active recall on the lpfp. I went ahead with the recall, and a few weeks later I started having issues of my car stalling around 1/4 of a tank. My car was able to start back up though, and was able to drive to a gas station. I took it back to the dealership a couple weeks ago and told them about the issue and also informed them it was likely the lpfp as I only started having issues with it after the recall. They said the lpfp was good and not the issue. They recommended to replace the entire fuel tank because the level sensor in the tank had gone bad. The repair cost was initially ~$1,300 and they misquoted the repair and later said it would be $1800 after they did the repair, for the repair, and that’s after they cut the cost down. After paying so much money I was sure the issue wouldn’t happen again, but low and behold last week I was left stranded as my car would not start and the fuel tank was bone dry with the fuel gauge showing 1/4 and 86 miles left. I have an appointment with bmw in a couple days. I would like to have more knowledge on this issue and would be greatly appreciate if I could get more input on this. Am I entitled a refund because they misdiagnosed the issue?

amlowvolt · 12-24-2024, 04:05 PM

cwolfe12898, what did you find out at the dealership? Did you get your money back? What was the root cause? I’m trying to diagnose the same issue. TIA

David Kunitz · 02-03-2025, 05:11 AM

Has anyone figured this issue out?

My 335i stalls at just above 1/4 tank.

The car reads 22 liters of fuel in the left tank and almost nothing on the right tank when it stalls.

If I put in 5 liters it will read that in the right tank...

Perhaps try empty the tank, replace LPFP and fuel filter??

lllRazorlll · 03-04-2025, 09:14 AM

It could be the fuel pump in the gas tank. My old E46 had this exact issue and it was the fuel pump

07-23-2020, 09:04 AM	#25
zole2112 Modder of everything I own 148 Rep 491 Posts Drives: 2013 335i Xdrive Join Date: Mar 2017 Location: Appleton, WI iTrader: (0)	I had similar issues with mine, ultimately it was the HPFP. I changed from my Stage 2 LPFP back to the stock LPFP and it was good for about a day so I thought that was it but then it happened again. After changing the HPFP last fall I haven't had an issue since. The first instance stalling was going about 25 mph along with a low pressure code, I forget what it was. This led me to change my LPFP back to stock, I've had lots of practice so I can change in in like 15 min lol. After that I had it stall at highway speed along with a high pressure code, then I replaced the HPFP which fixed my issue. __________________ 2013 BMW 335xi F30 N55 PWG/VRSF DP/ER CP/Injen CAI/AA FMIC/JB4 map 7/Fuel= E50 w/ E85:93oct/Stock LPFP & HPFP/CATuned coilovers/Megan Racing Rear Swaybar/Powerflex Rear Subframe Bushing Inserts/Dual aFe Power Mach Force Mufflers/Resonator Delete/MHD & BMS Race BEF
	Appreciate 0 Quote

05-26-2021, 10:09 PM	#29
TerryGTX Private First Class 48 Rep 160 Posts Drives: 2014 Bmw 435xi M-sport Join Date: Sep 2017 Location: Boston, MA USA iTrader: (0)	Turned out to be his LPFP. He replaced with a new one. Also his cleaned fuel tank might also play a factor here. Well...for me my solution is to keep my fuel always above 1/4 tank. Puzzle solved.
	Appreciate 0 Quote

05-26-2021, 10:11 PM	#30
n55david Check out my Youtube @n55david! 1442 Rep 3,697 Posts Drives: 2017 m240i, 2015 X3 x35i Join Date: Aug 2018 Location: Michigan USA iTrader: (0) Garage List 2020 BMW X4M [10.00] 2017 BMW m240i xDrive [10.00] 2015 X3 x35i [10.00]	so I recently had this issue. wasn't the fuel pump fyi. however replacing it would fix the problem by association. __________________ 2017 m240i xDrive 10.40@132.87mph w/bm3 2015 335i xDrive 10.95@124.99mph w/bm3 - SOLD 2015 X3 x35i pwg 12.96 catless w/bm3 stage 2 93 ots IG: @n55david For pics and updates! Youtube: @ n55david For videos or Racing etc
	Appreciate 0 Quote

12-14-2024, 08:59 AM	#33
cwolfe12898 New Member 0 Rep 14 Posts Drives: BMW 335ix Join Date: Apr 2024 Location: North Carolina iTrader: (0)	Hello all, I recently have been having this same exact issue as OP. Here’s the story. In June this year I took my 2013 335i drive that I recently purchased to a bmw dealership do a general inspection to make sure nothing was wrong. They informed me that my vehicle had an active recall on the lpfp. I went ahead with the recall, and a few weeks later I started having issues of my car stalling around 1/4 of a tank. My car was able to start back up though, and was able to drive to a gas station. I took it back to the dealership a couple weeks ago and told them about the issue and also informed them it was likely the lpfp as I only started having issues with it after the recall. They said the lpfp was good and not the issue. They recommended to replace the entire fuel tank because the level sensor in the tank had gone bad. The repair cost was initially ~$1,300 and they misquoted the repair and later said it would be $1800 after they did the repair, for the repair, and that’s after they cut the cost down. After paying so much money I was sure the issue wouldn’t happen again, but low and behold last week I was left stranded as my car would not start and the fuel tank was bone dry with the fuel gauge showing 1/4 and 86 miles left. I have an appointment with bmw in a couple days. I would like to have more knowledge on this issue and would be greatly appreciate if I could get more input on this. Am I entitled a refund because they misdiagnosed the issue?
	Appreciate 0 Quote

12-24-2024, 04:05 PM	#34
amlowvolt Bimmer Builder 0 Rep 9 Posts Drives: BMW Join Date: Jul 2022 Location: 99352 iTrader: (0) Garage List 2016 BMW F85 [0.00]	cwolfe12898, what did you find out at the dealership? Did you get your money back? What was the root cause? I’m trying to diagnose the same issue. TIA Last edited by amlowvolt; 12-24-2024 at 04:14 PM..
	Appreciate 0 Quote

02-03-2025, 05:11 AM	#35
David Kunitz Mr OEM 929 Rep 241 Posts Drives: BMW 335i Sport Line Join Date: May 2023 Location: Mbombela iTrader: (0) Garage List 2012 BMW 335i Sport ... [9.50]	Has anyone figured this issue out? My 335i stalls at just above 1/4 tank. The car reads 22 liters of fuel in the left tank and almost nothing on the right tank when it stalls. If I put in 5 liters it will read that in the right tank... Perhaps try empty the tank, replace LPFP and fuel filter??
	Appreciate 0 Quote

03-04-2025, 09:14 AM	#36
lllRazorlll Private First Class 55 Rep 149 Posts Drives: 2014 435i Join Date: Sep 2021 Location: Orange County, CA iTrader: (0)	It could be the fuel pump in the gas tank. My old E46 had this exact issue and it was the fuel pump __________________ 2014 435i Build Thread
	Appreciate 0 Quote

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search