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Go Back   TDIClub Forums > TDI Model Specific Discussions Areas > Audi SUVs (Q7 & Q5) and other V6 TDIs

Audi SUVs (Q7 & Q5) and other V6 TDIs Discussions area for Audi Q7 and Q5 TDI (2009+ in Canada & the US) as well as others with the V6 TDI such as the A6, A7 and A8 sedans.

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Old February 2nd, 2016, 18:29   #1
Aclarke
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Join Date: Jan 2016
Location: california
TDI(s): 2011 Q7
Default Hpfp died

Hello all,

Wife's 2011 Q7 with 90,000 miles suffered a HPFP failure and I have some questions after reviewing the factory service manual. Getting ready to time the new pump and was wondering if anyone can give me a better idea of where the plug for setting the crank at TDC is located on the block?? Picture in manual isnt helpful. Also, does the camshaft pulley need to be removed to see the timing mark?

Thanks,

Adam
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Old February 3rd, 2016, 06:45   #2
RebelTDI
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Join Date: Nov 2009
Location: Boston, MA
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I can't offer advise on hpfp replacement; however, did you check with Audi about replacement under warrenty? It may be covered, so it would be nice not to have to do it yourself. In many cases the entire fuel system has to be replaced due to contamination with fine metal shards throughout the fuel system. Best of luck.
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Old February 3rd, 2016, 09:10   #3
Aclarke
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Location: california
TDI(s): 2011 Q7
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Didn't check with them as I was under the impression only the 4 cylinder had the warranty extension?
Removed and cleaned all the fuel lines and installed a 2 micron filter before the new pump. We will see if the injectors need to be replaced...

Thanks

Adam
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Old February 26th, 2016, 06:44   #4
4ringking
 
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Join Date: Sep 2009
Location: Shrewsbury, NJ 07702
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We have had two of our customers 3.0l tdi's Fuel Pumps covered under extended warranty. One 2009 vehicle had 137K miles on it and it cost him $0 out of pocket.

We just had a customer fill up at a Speedway with Diesel and he got the bottom of the tank and had deposits in his fuel system. Since the fuel system damage was caused by a "outside influence" the dealer would not cover the repair. So, I recommended he call his insurance company and have them cover it under a comprehensive claim. He insurance company paid the bill and is going after the fuel station.
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Old March 25th, 2016, 14:24   #5
whizznbyu
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Join Date: Jul 2006
Location: Waxhaw, NC
TDI(s): 2005 Variant
Fuel Economy: 44 mpg @ 70 MPH. 46 mpg @ 55 MPH
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My 09 Q7 had a HPFP fail at 115K miles. Dealer said that it had too many miles on it. Then they said it was because I put the wrong fuel in it. I told them to put it down in writing that a TDI engine's life expectancy is right at 115K miles. I told them that I owned a B5 and a 97 PowerStroke, and I knew the difference between diesel and gas fuel pumps. I told them to put the "wrong fuel" clause in it because I was going to tell every single gas station I used that AUDI is accusing them of using water and cheap RUG in place of diesel.
Long story short, I told them that I was a member of this forum, and that I'd share all the info here.
$0 OOP.
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Old March 26th, 2016, 20:52   #6
Drivbiwire
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Join Date: Oct 1998
Location: Boise, Idaho
Fuel Economy: Who cares, it's a diesel!
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Let us know, we have great success with getting the original injectors working again.

http://www.dbwllc.net/product/piezo-...rail-injector/
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Old April 4th, 2016, 17:42   #7
n1das
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Join Date: Jun 2002
Location: Nashua, NH, USA
Fuel Economy: Who cares? It's a DIESEL! Great fuel economy comes as a bonus!
Exclamation

Free water seems to be what's killing these pumps and does so much faster than poor lubricity will. Anybody noticed a spike in HPFP failures in cold regions during winter months where condensation is more of a problem??
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Old April 30th, 2018, 05:52   #8
DrobKGB
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Join Date: Apr 2018
Location: Iowa
TDI(s): 2012 Q7
Default Diy?

My 2012 Q7 (165k miles) has been having an issue the last 4 months where randomly, after it has been running and is warm, it will crank forever but not fire.
Usually, I can cycle the key a few times (priming the low pressure pump?) and it will start.
I have zero issues with it when it is running.

I'm assuming this is the HPFP issue.. and I'd like to fix it before it craps the bed while driving.

It appears that it is right on top up front... and that makes me think I should tackle it myself (I've done everything from CV shafts to suspension to blower motors on this car, and both my other Audis... I have a VCDS)... however... seeing info about "timing" the pump makes me nervous.. is there a link to the service manual or a DIY around?
Is this something I should tackle, or should the entire fuel system be flushed?

All my searches come up with "the dealer told me $138,238,123". I haven't found any "this $#& part broke while I was...".

Thanks in advance for any help!
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Old May 26th, 2018, 23:05   #9
da.hs
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Join Date: Jul 2012
Location: SK, Canada
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I can't be much help: but "the HPFP issue" is normally catastrophic failure while driving, not intermittent no-starts. Nothing in VCDS about low fuel rail pressure?
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Old June 19th, 2018, 17:03   #10
DrobKGB
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Location: Iowa
TDI(s): 2012 Q7
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No trouble codes at all, actually.
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