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7 Series - E65 / E66 (2002 - 2008)
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  #26  
Old 12-02-2012, 03:12 PM
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Here is the part number
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  #27  
Old 12-02-2012, 03:37 PM
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Hi just caught up on your topic my 760Li was near doing the same thing until I took it to my dealers and they investigated it for me. It wasn't the integrated module which I replaced or anything like that it was to do with the fuel system, I've attached some pics below of the work report hope it helps (that's if you haven't got it fixed already) and I also have a spare IGM.
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  #28  
Old 12-02-2012, 03:43 PM
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The IGM is in the UK but there if you need it. Not every car will have the same fault but its a start to look and plus even though my dealer had my car for 2 weeks plus I had an oil service the work was still less than 800. Good luck hope you find the fault
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  #29  
Old 12-02-2012, 04:00 PM
rsbolin@me.com rsbolin@me.com is offline
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new760Liowner: I have not scanned myself with INPA. I had the mechanic run a scan. Mechanic told me that the HPFP is measured in BARS and should be 120, converted to PSI it should be 1,740.

I have replaced both fuel filters and the fuel pump.

There is no way to tell if the carbon cleaning has improved anything since I cannot drive car more than a few miles at a time.

Gadget760Li: I have not replaced the IGM which in the US is the Integrated Power Supply Module, part number 12527510638. Matching your jpeg. That one thing I was going try, and then the Crankshaft Speed Sensor. Tell me what you want for the part and we can do the deal on PayPal.

I found a HPFP on eBay for $400.00. Problem is I do not think replacing the HPFPs is a DIY job.
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  #30  
Old 12-02-2012, 04:02 PM
rsbolin@me.com rsbolin@me.com is offline
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Rookie2008: Thank you for the JPEG of the part and the part number.

Thank all of you for offering advice and experience with this issue.
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  #31  
Old 12-02-2012, 04:15 PM
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I brought it for 40 which is $64 but I'm not sure how much the postage would cost ill check it out tomorrow I'll send it via Royal Mail, let me know the state it's going please
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  #32  
Old 12-02-2012, 04:17 PM
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Forgot to mention I only want $50 for it and I will get back to you about the posting
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  #33  
Old 12-02-2012, 09:08 PM
new760Liowner new760Liowner is offline
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What I meant is, did the mechanic retrieve the psi value from a sensor scan or physical pressure gage mounted on the fuel output line? If it was from a scan, does the mechanic's scan produce the correct value from a car without the problem? Just want to make sure the
fuel rail sensor giving you the low 400-450 psi value is functional.

I'd also look at the discharge pressure from the fuel pump in the fuel tank to make sure it is within spec. Also, try to see if the mechanic can monitor and record the fuel rail pressure when you first start it up and then until it stalls, both for the psi value and to see if it fluctuates or is steady for a given RPM.

If the 400-450 psi fuel rail values are constant, and for both sides, I would look to an upstream problem (like maybe air in the HPFP suction) as it is unlikely both HPFPs suffered a mechanical problem at the same time.

Since you are dealing with very high pressures, I would take extra time and do a little more research on materials and techniques if you decide to DIY.

Please keep us posted with your progress as this thread will probably help a future 760 owner.
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  #34  
Old 12-03-2012, 05:47 AM
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Gadget 760Liowner, my US zip code is 29650, South Carolina, Greer.

New 760Liowner, I will ask the questions of the mechanic. He connected a diagnostic device that looks like a hard case laptop. Connected to the OBD port. Good questions which I will in turn ask the mechanic.

Thank you to everyone that continue to provide insight and recommendations.
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  #35  
Old 12-05-2012, 09:01 AM
rsbolin@me.com rsbolin@me.com is offline
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Car stalled several times yesterday. I am chewing the bullet and it is now at the BMW service center for diagnostic. Will keep the forum apprised of the outcome.
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  #36  
Old 12-07-2012, 04:53 PM
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I'm hoping this is not the case but I had a 2004 760LI with exact issues I did alot of fixes and when the smoke cleared it was the HPFP, if you find one cheap like you said I would jump on it and then find a reasonable indy to install.
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  #37  
Old 12-08-2012, 04:59 AM
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BigWalk, thank you for replying to the post. How much did it cost to get the HPFPs replaced?

Does anyone else believe that the Integrated Power Supply Module could be a suspect?

Otherwise, the 760 is still at the BMW Service Center. First contact from them was that the DME was full of error codes. They cleared them, drove the car for a few miles, scanned again and found one error code related an oxygen sensor. They said they doubted that was the problem. Cleared the code. No new codes since then.

Shop foreman asked to drive the car home. Car was difficult to start but once started he said it never stalled. Same the next morning brining it back to work. Hard start but once running did not stall.

I touched base yesterday to get an update. Shop foreman said they are stumped. Only 6 of the in the Greenville-Spartanburg area and they hardly see one come in for other than regular maintenance.

He did say that the they are noticing that it takes a while for fuel to get to the engine. Once the engine is turned off the fuel should stay there and pressurized. He said they are seeing the fuel pressure drop way off as soon as the car is turned off. He said possible issues they are trying to isolate are fuel injectors, fuel lines, HPFP's. I told him I had already put $1.2K into the car for for fuel filters and a fuel pump. Could he have this identified so that I can take the car on my upcoming vacation at the end of next week
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  #38  
Old 12-09-2012, 05:17 PM
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It cost me 2700 at an indy as they felt sorry for me since I had just spent money on other things
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  #39  
Old 12-10-2012, 05:07 PM
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BMW Service advisor telephoned this afternoon to say that they would like to replace the return valve to the gas tank. $650.00. I asked if this is the pressure damping vent valve allowing manifold vacuum into the return line? Advisor said he did not know. I asked to have the mechanic contact me to discuss. They made sure to tell me that this is the starting point for identifying the problem which tells me, or at least I hope that it tells me, the HPFP's may not be the problem. Fingers crossed.

If you look at the earlier post in this thread from Gadget760Li you will see why I was asking the question.

By the way, I live in Greenville, SC so you can look up who the dealer is in this area.
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  #40  
Old 12-10-2012, 05:08 PM
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Forgot to say thanks to bigwalk for providing his cost information in his HPFP replacement. I would hate to do it but I will pay that just to be able to drive the car considering I have put less than 150 miles on in the 6 weeks I have owned it.
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  #41  
Old 12-10-2012, 06:04 PM
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Quote:
Originally Posted by rsbolin@me.com View Post
Forgot to say thanks to bigwalk for providing his cost information in his HPFP replacement. I would hate to do it but I will pay that just to be able to drive the car considering I have put less than 150 miles on in the 6 weeks I have owned it.
That is pretty rediculous.. If it were me I would be giving the dealership that sold me that thing hell until they made good.. they can't sell you something that doesn't run right when you pull it off the trailer.. I could understand if you bought it and a day or two later it broke, bad timing, but it was broken when you got it..
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  #42  
Old 12-11-2012, 05:39 PM
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Quote:
Originally Posted by cmpcpro View Post
That is pretty rediculous.. If it were me I would be giving the dealership that sold me that thing hell until they made good.. they can't sell you something that doesn't run right when you pull it off the trailer.. I could understand if you bought it and a day or two later it broke, bad timing, but it was broken when you got it..
Truth - you can't tell e they didn't know at all.
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  #43  
Old 12-13-2012, 04:36 PM
rsbolin@me.com rsbolin@me.com is offline
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This is the latest news I have on the 760i stalling problem. Century BMW in Greenville tells me the car is inoperable and is a hazard in this condition. UGH!

- High Pressure Fuel Pumps. HPFP on Bank 1 failing. $2,600 parts, 12 hours labor, costs: $4,092.00
- Return Valve not holding pressure. Parts and labor: $650.00.

Service Advisor said they are confident that if they replace the HPFP on bank 1 it will result in HPFP failure on bank 2. Two HPFP, $5,300.00, 24 hours of labor, $2,865.00, total parts and labor: $8,163.00.

Also, have any of you owners with Active Headlights seen an active headlight assembly failure. Headlight looks fine to me other than the Angel Eye not lighting. BMW says it is not a safety hazard and does not impact drivability.

If you know of any BMW indy service in Greenville, SC let me know. I have used Beamers and Benz for service on my 1998 BMW 750iL in the past. They did good work and charged reasonable fees. Unfortunately, when I asked them about HPFP's they said the dealer should do the work.

MOPAULY, I have been in touch with the dealer in Houston that I purchased the car from, Autobyzack, and they requested the detailed BMW repair estimate. Let's hope they keep their word to me that "Everything will be alright. Send us what BMW has provided".

Thanks for all the replies and keep them coming.
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  #44  
Old 12-15-2012, 07:23 PM
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make sure those losers (dealer that sold u the car) fix this car at a BMW dealer of your choice (so u have a warranty on all repairs and so its close to your house and convenient for u)

at their expense, of course
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  #45  
Old 12-15-2012, 07:39 PM
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Seven11, I am sure they are in a state of shock once they saw the service repair estimate from Century BMW. They told me not to worry now let us see if they keep their word.

Anyone ever have an active headlamps failure? As I said before, only Angel Eye is not lighting.
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  #46  
Old 12-17-2012, 08:00 AM
new760Liowner new760Liowner is offline
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Can anyone confirm if there is a low fuel pressure sensor on the N73?

I was reading some posts on the 3-series boards about HPFP failures and one post mentioned that while using INPA, he noticed the low fuel pressure sensor reading was near the max at 7400 hPa (basically 7.4 bar) and the service advisers were giving him the huge HPFP repair bill estimate. After replacing the low fuel pressure sensor, the INPA reading went down to around 5000 hPa (around 5 bar) and his hesitation/drivability symptoms went
away; the high pressure readings were somewhat constant between 48000-50000 hPa (~48-50 bar).

I looked at the real oem and spaghetticoder sites and didn't find a reference to the low pressure sensors, only the high pressure sensors on the rails.
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  #47  
Old 12-18-2012, 09:53 AM
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Hope they foot the bill for you, let us know what happens.
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  #48  
Old 12-19-2012, 08:03 AM
rsbolin@me.com rsbolin@me.com is offline
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As mentioned previously, I sent the Century BMW repair estimate to the the dealer in Houston. No response from them. My presumption is they are shell shocked with the $10K to replace both HPFP's. I am still trying to work with them to cover some portion of these repairs.

With regard to the low pressure fuel sensor, I have not seen that mentioned in the 7 series threads that I have read.

Does anyone advise replacing the integrate power supply module as had been previously mentioned in the thread by Gadget760Li.

By the way, do a You Tube search on BMW high pressure fuel pumps and you will find several failures and the safety concern these failures are causing the owners of these cars.
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  #49  
Old 12-19-2012, 09:13 AM
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I don't think you should have to pay for any of this.. If they don't want to pay for it and they think they can get it done cheaper or mickey mouse it then return the car and get your money back.. but you just bought the car and it came with these issues, don't spend your money to fix it.. you deserve a working car for atleast the first day you get it.
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  #50  
Old 12-19-2012, 09:52 AM
rsbolin@me.com rsbolin@me.com is offline
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I am trying my best to get the dealer to own up to the repairs. Some things are regular maintenance but others are not and if the dealer truly inspected they should have found. The HPFP's going out in less than 50 miles of ownership should be covered without question by the dealer.

I will keep posting until this is resolved.
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