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Open Roads Forum  >  Tow Vehicles

 > Ford's answers to the NHTSA 6.7 Investigation

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Wills250psd

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Posted: 07/20/12 09:17am Link  |  Quote  |  Print  |  Notify Moderator

OK ONE MORE

Capt Skup

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Posted: 07/20/12 11:48am Link  |  Quote  |  Print  |  Notify Moderator

1001!


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NinerBikes

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Posted: 07/26/12 06:05pm Link  |  Quote  |  Print  |  Notify Moderator

Why piezo injectors go BOOM and grenade your whole fuel system?

This explains a lot of things, also explains why 2012 and 2013 Passat TDI's with SOLENOID INJECTORS are not destroying HPFP's, while piezo injectors, even in 1600 bar VW V6 3.0L TDI's with piezo still are wrecking HPFP's.

The mechanic I spoke with recently said that they've done at least 4 HPFP's on 2009-2010 Touareg TDI's. I've no idea when Vw will switch the Touareg over to solenoid injectors, if they haven't already or if it's a 2013 development.





NinerBikes

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Posted: 07/29/12 11:29am Link  |  Quote  |  Print  |  Notify Moderator

Go to post #7 in the original link above.

* This post was edited 07/29/12 11:16pm by NinerBikes *

Jarlaxle

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Posted: 07/29/12 07:19pm Link  |  Quote  |  Print  |  Notify Moderator

Bad link.


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NinerBikes

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Posted: 07/29/12 07:45pm Link  |  Quote  |  Print  |  Notify Moderator

Go down to post #7 in the original link?

Jarlaxle

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Posted: 07/29/12 08:21pm Link  |  Quote  |  Print  |  Notify Moderator

The link does not work. The page linked to does not exist. Clicking it gives an error message.

NinerBikes

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Posted: 07/29/12 11:22pm Link  |  Quote  |  Print  |  Notify Moderator

Try this

or cut and paste this in your browser.. http://www.myturbodiesel.com/forum/f19/common-rail-fuel-system-failures-17657/#post70238



Jarlaxle wrote:

The link does not work. The page linked to does not exist. Clicking it gives an error message.


NewsW

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Posted: 07/30/12 06:11am Link  |  Quote  |  Print  |  Notify Moderator

NinerBikes wrote:

Why piezo injectors go BOOM and grenade your whole fuel system?

This explains a lot of things, also explains why 2012 and 2013 Passat TDI's with SOLENOID INJECTORS are not destroying HPFP's, while piezo injectors, even in 1600 bar VW V6 3.0L TDI's with piezo still are wrecking HPFP's.

The mechanic I spoke with recently said that they've done at least 4 HPFP's on 2009-2010 Touareg TDI's. I've no idea when Vw will switch the Touareg over to solenoid injectors, if they haven't already or if it's a 2013 development.




I need to see how fuel can get into the cavity that contain the piezo electric discs, and how it can get back to the fuel tank or pump.

Can you post a set of pictures or engineering drawings?

NewsW

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Posted: 08/21/12 01:39pm Link  |  Quote  |  Print  |  Notify Moderator

Those of you out there with the CP 4 Pump... here is the latest twist:


http://forums.tdiclub.com/showpost.php?p=3907598&postcount=3840


Quote:


Quote:
Originally Posted by storx View Post
I just recently installed a fuel pressure gauge in my car because I been wiring up my gauges for big turbo install... I noticed that under full boost at higher RPMs the gauge shows my inlet pressure to Bosch pump was dropping almost in half... I talked to dealership and according to there repair manual it's still within tolerance so I'm ordering a air dog unit pretty soon here...I have a 24valve cummins that suffered from IP failures from low fuel pressure so I'm not taking chances and just adding additional pump to assure solid pressure


Hmmmm... cavitation, if it occurred, could theoretically provoke a failure of the pump's HP section.

This is an interesting possibility....




Cavitation would mean many things, including lack of lubrication.

Note the removal of the coating from one part and not the other.

That can mean the DLC coated parts have different surface tension characteristics with diesel fuel.... or contaminants like water... or...

Summer is nearly over... and I am now sitting around waiting for the failure reports to come in for the next iteration of the analysis.

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