Home Forums Articles How To's FAQ Register
Go Back   Xoutpost.com > BMW SAV Forums > X5 (E53) Forum
Arnott
User Name
Password
Member List Premier Membership Search Today's Posts Mark Forums Read

Xoutpost server transfer and maintenance is occurring....
Xoutpost is currently undergoing a planned server migration.... stay tuned for new developments.... sincerely, the management


Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 09-07-2023, 02:18 AM
Member
 
Join Date: Jul 2023
Location: Uk
Posts: 22
IsStupid is on a distinguished road
Hot start issue m62tub44

M62TUB44 is cranking for ages when hot before it finally starts. Going to try and change a fuel pump and filter to see if that helps, anything else worth a shot? On m60s there's an ECU coolant temp sensor that causes similar issues? Worth changing on m62? Where is it?
Cheers
Reply With Quote

Sponsored Links

  #2  
Old 09-07-2023, 04:15 PM
Member
 
Join Date: Nov 2021
Location: UK
Posts: 156
Themoog is on a distinguished road
Mine does that sometimes. It’s very intermittent. I put a new filter on which made no difference and I did buy a fuel pressure tester to see if the fuel supply is the issue ie non return valve but still haven’t got round to checking it. I’m also going to remove the crank sensor and give it a clean to see if that helps.
Reply With Quote
  #3  
Old 09-07-2023, 10:01 PM
Henn28's Avatar
Premier Member
 
Join Date: May 2021
Location: Louisiana
Posts: 821
Henn28 is on a distinguished road
Quote:
Originally Posted by Themoog View Post
Mine does that sometimes. It’s very intermittent. I put a new filter on which made no difference and I did buy a fuel pressure tester to see if the fuel supply is the issue ie non return valve but still haven’t got round to checking it. I’m also going to remove the crank sensor and give it a clean to see if that helps.
Same, both with the original 4.4 and now with the 4.6 in the car. Never been able to fix it, even with a new fuel pump, filter and cleaned/flow tested injectors. My fuel filter is the older smaller one which was only used for a few years, and doesn’t have the pressure regulator. My current hypothesis is that pressure occasionally leaks down at the rail, but not always, for some reason, rather than air or spark related.

So I’ve just gotten in the habit of getting in the car and immediately turning the ignition to run, then buckling up and then cranking the X. Has never happened when I follow this routine.

I have been chasing a very occasional fuel vent system code and wonder if fuel pressure could leak down through that system.
__________________
Current
Original owner 2002 E53 X5 4.4i to 4.6i swap
2025 G06 X5 50e
Former
1972 Audi Fox
1986 Saab 900S
1996 BMW Z3
1998 BMW E36 M3 Sedan
2004 BMW E46 M3
2006 Audi A3 Quatro
1993 Mopar 318 Jeep Grand Cherokee
2015 V6 Jeep Grand Cherokee
Reply With Quote
  #4  
Old 09-08-2023, 01:34 AM
andrewwynn's Avatar
Member
 
Join Date: Jun 2015
Location: Racine, WI
Posts: 11,257
andrewwynn will become famous soon enough
Wife's would do this when the FPR failed. Technically just an o-ring. Test the gas pressure at the rail and let it sit overnight. If you don't have 10-20 psi these FPR is leaking back to the tank.


Sent from my iPhone using Tapatalk Pro
__________________
2011 E70 • N55 (me)
2012 E70 • N63 (wife)
Reply With Quote
  #5  
Old 09-08-2023, 07:59 AM
Henn28's Avatar
Premier Member
 
Join Date: May 2021
Location: Louisiana
Posts: 821
Henn28 is on a distinguished road
Quote:
Originally Posted by andrewwynn View Post
Wife's would do this when the FPR failed. Technically just an o-ring. Test the gas pressure at the rail and let it sit overnight. If you don't have 10-20 psi these FPR is leaking back to the tank.


Sent from my iPhone using Tapatalk Pro
Thanks Andrew, you are definitely correct. I’ve put a gauge on it and it does leak down, occasionally. I’m just not sure how to fix it, or if there is anything to fix at all since the car doesn’t have a pressure regulator like the ones with the “newer” (larger) fuel filters do. I’m assuming that the fuel pump is supposed to keep the pressure from bleeding down on the cars with the older filter version, but it is only a year old. Hence my theory about the purge/vent system perhaps being the cause.

I asked my wife last night if she recalls it being hard to start when she drove the car daily (bought it new for her in 2002) and she said it’s been doing it occasionally for as long as she could remember.
__________________
Current
Original owner 2002 E53 X5 4.4i to 4.6i swap
2025 G06 X5 50e
Former
1972 Audi Fox
1986 Saab 900S
1996 BMW Z3
1998 BMW E36 M3 Sedan
2004 BMW E46 M3
2006 Audi A3 Quatro
1993 Mopar 318 Jeep Grand Cherokee
2015 V6 Jeep Grand Cherokee
Reply With Quote
  #6  
Old 09-08-2023, 08:20 AM
andrewwynn's Avatar
Member
 
Join Date: Jun 2015
Location: Racine, WI
Posts: 11,257
andrewwynn will become famous soon enough
Hot start issue m62tub44

I had 01 with the large filter and FPR built in.

On realoem what does it show for FPR/filter? Yes got to have an FPR or it's not going to have the return line that feeds the siphon jet. Follow the return line to the left tank and see where it goes maybe the FPR is a separate unit on your car.
__________________
2011 E70 • N55 (me)
2012 E70 • N63 (wife)

Last edited by andrewwynn; 09-08-2023 at 01:15 PM.
Reply With Quote
  #7  
Old 09-08-2023, 08:59 AM
Member
 
Join Date: Mar 2016
Location: Saskatchewan Canada
Posts: 2,275
80stech is on a distinguished road
I thought the difference was weather or not the regulator was removable from the filter not that the regulator was at another location. Anyway, regulator is the least likely cause of fuel leak down.
__________________
1988 325is (purchased new) sold
2004 X5 3.0 2005 X3 2.5
2008 X5 3.0 (new to me)
Reply With Quote
  #8  
Old 09-08-2023, 09:55 AM
Henn28's Avatar
Premier Member
 
Join Date: May 2021
Location: Louisiana
Posts: 821
Henn28 is on a distinguished road
Thanks Gents. 6/2002 4.4i build car with fuel filter 16126754016. ( https://www.realoem.com/bmw/enUS/par...&q=16126754016 )

I've looked through RealOEM and the car, and can't find a stand alone FPR. Maybe it is built into the smaller filter. If so, then it definitely isn't the FPR that is causing my occasional hard start since the OE filter I put in last year has maybe 10k on it.
__________________
Current
Original owner 2002 E53 X5 4.4i to 4.6i swap
2025 G06 X5 50e
Former
1972 Audi Fox
1986 Saab 900S
1996 BMW Z3
1998 BMW E36 M3 Sedan
2004 BMW E46 M3
2006 Audi A3 Quatro
1993 Mopar 318 Jeep Grand Cherokee
2015 V6 Jeep Grand Cherokee
Reply With Quote
  #9  
Old 09-08-2023, 09:57 AM
Member
 
Join Date: Jul 2023
Location: Uk
Posts: 22
IsStupid is on a distinguished road
Just changed fuel filter with the built in fpr after having a complete no fire incident earlier, too much cranking killed battery so had to be jumped. When I removed old filter it was hot at least 45°c! Will see if that makes a difference before changing pump. Will keep you posted since battery is on charge now. Why did BMW put the fpr on the filter? Why not on the fuel rail like they used to? Means fuel filters are 5x the price than they need to be. Wtf bmw
Reply With Quote
  #10  
Old 09-08-2023, 10:41 AM
andrewwynn's Avatar
Member
 
Join Date: Jun 2015
Location: Racine, WI
Posts: 11,257
andrewwynn will become famous soon enough
The filter and FPR can be replaced separately also the filter is good for half a million miles so they consider it "lifetime".



The o-ring on the FPR, however good for maybe 160-250,000.
__________________
2011 E70 • N55 (me)
2012 E70 • N63 (wife)
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On





All times are GMT -4. The time now is 10:18 PM.
vBulletin, Copyright 2024, Jelsoft Enterprises Ltd. SEO by vBSEO 3.6.0
© 2017 Xoutpost.com. All rights reserved. Xoutpost.com is a private enthusiast site not associated with BMW AG.
The BMW name, marks, M stripe logo, and Roundel logo as well as X3, X5 and X6 designations used in the pages of this Web Site are the property of BMW AG.
This web site is not sponsored or affiliated in any way with BMW AG or any of its subsidiaries.