|
|
|
|
|
|
BMW Garage | BMW Meets | Register | Today's Posts | Search |
|
BMW 3-Series (E90 E92) Forum
>
Can a failing hpfp have an effect on the lpfp?? Please help!
|
|
04-22-2013, 07:47 PM | #1 |
Private First Class
10
Rep 101
Posts |
Can a failing hpfp have an effect on the lpfp?? Please help!
PLEASE HELP!! I have been having low lfp for some time now and codes associated with it. Supposed to be 72psi and has been getting worse over time. Now it basically sits at 32psi and lowers under WOT. I have basically replaced the entire low fuel pressure system. First I replaced the lpfp with the walbro 455 (yes I have run e85.. but only about 3 tanks of an e30 mix). Problem persisted but car ran fine and trims were in check but then the car went into limp due to low fuel pressure. I thought maybe it was the lfp sensor so I replaced that. Still the proplem persisted so I replaced the fuel pressure regulator/filter. Still no change. This is about to drive me crazy. I have replaced fuses as well just to be sure. Does anybody have any idea what else this could be. The low pressure system is all new. Could the hpfp or the injectors cause the lfp to be low if one of them are failing. Also according to logs. The car is not running lean and hfp is at target. Although I was not logging the few times the car threw the injector shutdown code and went into limp. Please help if you have any idea. I am out of warranty and really don't wanna be raped by a dealer but I am about to that point. Thanks for your time
__________________
Space Gray 6mt e92, coral red,Cobb tuned, custom e30 map, bms DCI, ETS FMIC, walbro 455 lpfp.
|
04-22-2013, 08:51 PM | #2 |
Captain
39
Rep 656
Posts |
I just got my HPFP replaced, before it was replaced i was getting code for lpfp fail and lpfp sensor fail. Dealer only change the hpfp and everything is working now with no codes. so quite possible. I was getting hpfp codes at the same time though.
|
Appreciate
0
|
04-22-2013, 08:59 PM | #3 |
Private First Class
10
Rep 101
Posts |
Yea I have gotten both lp sensor and pump failure codes as well. I have had nothing on the hp side yet. Were you getting long cranks and the usual hpfp symptoms? I have yet to experience any of the usual symptoms which, in combination with the codes, made me fell sure the problem was in the low pressure system. Thanks for the reply. That atleast lets me know of another possibility...and hopefully a warranty fix.
__________________
Space Gray 6mt e92, coral red,Cobb tuned, custom e30 map, bms DCI, ETS FMIC, walbro 455 lpfp.
|
Appreciate
0
|
04-22-2013, 09:03 PM | #5 |
Private First Class
10
Rep 101
Posts |
Btw. Do you remember if you were getting 2A2D codes.. low fuel pressure. Thanks again.
__________________
Space Gray 6mt e92, coral red,Cobb tuned, custom e30 map, bms DCI, ETS FMIC, walbro 455 lpfp.
|
Appreciate
0
|
04-22-2013, 11:17 PM | #7 |
Captain
50
Rep 923
Posts |
Check out this thread. It may be related to what you are experiencing:
http://www.e90post.com/forums/showthread.php?t=821304 It may not be related, but something else you could check. |
Appreciate
0
|
04-22-2013, 11:27 PM | #8 | |
Lieutenant
15
Rep 506
Posts |
Quote:
|
|
Appreciate
0
|
04-23-2013, 09:20 AM | #9 |
Lieutenant
30
Rep 474
Posts |
Replacing my HPFP cured my LPFP under-target issues completely. I thought my LPFP was going for a while. Logs of HPFP and LPFP seamed to indicate the LPFP was the culprit. I finally starting hitting limp mode under WOT, and popped codes associated with the HPFP recall, so I had it replaced under that campaign just to rule it out. I have not had an LPFP issue since, it's good to go with ~E45 FBO.
__________________
//ecg//
|
Appreciate
0
|
04-23-2013, 03:49 PM | #10 | ||||
Private First Class
10
Rep 101
Posts |
Quote:
Quote:
Quote:
Quote:
__________________
Space Gray 6mt e92, coral red,Cobb tuned, custom e30 map, bms DCI, ETS FMIC, walbro 455 lpfp.
|
||||
Appreciate
0
|
04-23-2013, 04:20 PM | #11 |
Captain
14
Rep 961
Posts |
Wishing you luck on getting this fixed!!!
__________________
"I'm not surprised you get along well with all the other neighbours. If you put fifty children with Down's syndrome in a room there is going to be a lot of hugging." David Thorne
|
Appreciate
0
|
04-23-2013, 04:31 PM | #12 |
Captain
39
Rep 656
Posts |
Just looked at my paperwork, i did have a 2A2D code which they replaced the low fuel pressure sensor along with the hpfp.
Sounds like hpfp is your culprit if you haven't changed it yet. |
Appreciate
0
|
04-23-2013, 04:33 PM | #13 |
Private First Class
10
Rep 101
Posts |
Thanks man. Its driving me crazy not to mention a lot of time and $500+ so far. Luckily I have another vehicle. Probably gonna have to go to the stealership and suck it up. Hopefully its the hpfp under warranty.
__________________
Space Gray 6mt e92, coral red,Cobb tuned, custom e30 map, bms DCI, ETS FMIC, walbro 455 lpfp.
|
Appreciate
0
|
04-23-2013, 04:36 PM | #14 |
Private First Class
10
Rep 101
Posts |
Hopefully so. I know the car was on its third hpfp when I bought over a year ago. My pump has a part number on it ending with -02 and from what I have seen the newest version is ends with -03. Thanks for taking the time to look for me.
__________________
Space Gray 6mt e92, coral red,Cobb tuned, custom e30 map, bms DCI, ETS FMIC, walbro 455 lpfp.
|
Appreciate
0
|
Bookmarks |
|
|