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High Pressure Fuel Pump (hpfp) DIY
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09-14-2017, 09:42 AM | #46 | |
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http://www.e90post.com/forums/showthread.php?t=1033469 If you are going stage 3/4 anyway, just as well do the hpfp now....but Im not sure its going to solve your issue... but it will def remove the possibility and make diagnosis easier. |
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09-15-2017, 09:02 PM | #47 | |
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Good find, Omaha.
Got-Torque, might want to swap the lpfp too, just to be safe. If it's on its way out, it might hurt the R90 hpfp. Quote:
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09-17-2017, 12:56 AM | #48 |
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thanks for the info. I just got the pump installed, had to loosen up the alternator bracket as it was not letting the pump slide all the way into the housing. I have a few things to button up tomorrow and then I'll find out if it fixed it or not.
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09-17-2017, 02:47 PM | #49 |
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Any info? Has it fixed your rail issue?
I'm contiplating installing mine this afternoon... I need to pull the intake to swap a glow plug so, mine as well do it while the mani and cowl is off. |
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09-17-2017, 05:27 PM | #50 |
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No update yet, took the family shopping and won't get back to it until later tonight (hopefully).
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09-17-2017, 11:39 PM | #51 |
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Used pump came with a cracked fuel metering valve (fuel control actuator) electrical connector that was epoxied back on (wtf?). I tried to make it work but when I slowly attached the wiring to it, it broke off. So I had to swap my existing one onto the used pump (was hoping to rule it out as well by the change). Got it all buttoned back up and just took it for a drive. After 5 easy miles, first hard acceleration popped the same codes back up and put it in limp mode.
4560 & 4570. So what's next in determining where the problem might be? Can I log demanded rail pressure vs actual rail pressure in the Torque Pro app? (sorry I've only used it for gauges so far). Or will that just show the obvious (that they don't match and hence the codes)? |
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09-18-2017, 12:18 AM | #52 | |
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http://www.e90post.com/forums/showthread.php?t=1419824 |
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09-18-2017, 09:55 AM | #53 | |
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You were very correct in worrying about that metering valve, as stated in previous posts, that could be the cause of issues. Get in touch with your seller and get another one....and hope.. However, my guess is that isnt going to fix it....and the lpfp might have to be next....Im sure there is some sort of test that you could to test flow rate or pressure, but it might be more cost effective just to change it... When you get a code....is the engine dying or is it still pulling hard? that MAY indicated whether its a false positive (ie a sensor) or the rail actually being short on fuel... Personally, my car was actually dying when I went stage 3.......that got solved with my R90... |
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09-18-2017, 10:54 AM | #54 |
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Typically still pulling hard then it goes into reduced power mode. However, it did occur once with my son driving and it died.
Do these cars have a low pressure pump pressure sensor that could be logged? Possibly show that it is dropping pressure under a load and that the low pressure pump is not keeping up? |
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09-18-2017, 01:28 PM | #55 |
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Yes there is a low pressure pump sensor that I saw in ista when doing the fuel filter bleeding procedure. I'm not keen on test-o but ista-d can show you it.
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09-19-2017, 10:13 PM | #57 | |
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Thanks again for posting your DIY. I swapped my hpfp tonight and your diy made it easier.
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09-20-2017, 03:03 PM | #58 |
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I believe this parameter in TestO will give the "pre-supply fuel pressure". Not sure about what is the correct term here. In E39 you could see the fuel line under seat.
If you enter 'vorförder' into search box you'll see several more parameters like pre-supply with unit of litres/hour and RPM of pre-supply pump |
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09-20-2017, 05:27 PM | #59 | |
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Gosh it would be nice to know some German ....but Im having enough trouble learning Spanish.... |
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09-20-2017, 11:50 PM | #60 |
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Yeah :-)well for the next release there will be more english translations. I'll add this one too.
For that parameter my N47 with DDE 7.1 gave results of 3900 hPa, which is about 3.9bar (56 PSI) Last edited by pheno; 09-21-2017 at 01:27 AM.. |
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11-17-2017, 05:18 PM | #61 |
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little update:
After getting side tracked with a few other vehicle purchases, I was able to get back to working on the car. Installed a new LPFP as well as some other parts (front wheel bearings, water pump, thermostat, and one of Iaknown's intakes). Took it for a 150 mile test drive and thought all was well. Had the wife with me so I didn't get on it very hard. However today on the way to work I pushed it a little bit and it popped the same reduced engine output message. Codes were as follows: 3EED power management closed circuit protection 4AD5 DDE zero quantity adaptation injector cylinder 1 4560 DDE rail pressure plausibility delivery controlled ideas? |
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11-19-2017, 06:23 PM | #62 | |
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11-20-2017, 08:04 PM | #63 |
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I figured as much, I ordered one a few days ago, hopefully it shows up before turkey day so I can try it out.
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11-25-2017, 08:27 PM | #64 |
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New rail pressure sensor didn’t change anything, still going into limp mode with rail pressure plausibility codes...
Reset adaptions and see if it goes away? Tune related? |
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11-25-2017, 09:56 PM | #65 |
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DAMN it.. maybe....but you should be logging this to find out what your rail pressure is to see what the plausibility level is..
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