103kW/125kw TDI PD Piezo Siemens injector failure thread

[Greg Roles]

I found this US site, might be of interest....

2009 VW Jetta TDI Diesel Models being looked into by NHTSA

Fraid thats the high pressure fuel pump in the new common rails that is failing on mass in the US, they didn't get the mkV 125 tdi's thus avoided our injector woes, different story in Europe and the UK. Hope that US failure is US specific, we don't need more diesel problems!

[VWVIC]

Fraid thats the high pressure fuel pump in the new common rails that is failing on mass in the US, they didn't get the mkV 125 tdi's thus avoided our injector woes, different story in Europe and the UK. Hope that US failure is US specific, we don't need more diesel problems!

Can't win either way. Rail issues with the new fueling and injector failure with the old!

Hoping for a pick up of a GT tomorrow, and extending the warranty is top of the list...

[kaanage]

The post low pressure filter proposed by eddif at TDiClub would at least limit the damage in the CR engines to the pump rather than ruining the whole fuel system (injectors/lines/tank...). I wouldn't be surprised if VW (or even Bosch/Siemens who make it) added this at a later stage.

It wouldn't stop the failure (the failure mode proposed by Bluegrass at TDiClub seems plausible and SHOULD be relatively simple to prevent with a small piston guide) but at least it would be a lot less expensive to fix.

But back to the Piezo injectors...

[Greg Roles]

In a CR I'd be running a major 3 premium diesel, and consider a lubricating additive for the HPFP ( high pressure fuel pump ) even if Bluegrass above is correct. The TDI club crew are onto that though, at least you comon rail guys have the States working on solutions, us PD types are out in the breeze somewhat!

On that, I've tried to contact the place in the UK that claim to be able to rebuild the Pizeo injectors twice to no avail, but I'll keep on it. I've even let them know there are potential customers here waiting!!!

Greg.

[adrian112]

My car carked it, no warning about 6 weeks ago. just stopped abruptly as I was about to take off from the lights.

Scared the pants off me to be honest.

VW Assist & Dealer suspected it was fuel contamination, however they ended up replacing one of my injectors as well...

Didnt know it was such a big problem!

[RobV]

Worth a look, this is a good site on Siemens injectors.
https://sites.google.com/site/1810ma...iezo-injectors

[kaanage]

Yep, so good that Greg linked to it in the 1st post.

[RobV]

sorry, yr right of course, this issue is in my head and I just jumped, been without my car for 4 weeks and I am a bit P.O'ed. I have been to lots of sites regarding the injectors failing and there is no doubt this is a major problem.

[pongpagong]

adrian, same happened here. did they say anything about the 3 other injectors?

[RobV]

I was informed all injectors and loom required replacing! hugh $$$$$$$'s, I have taken this up with VW and waiting for a final response. Even though my car is over the 100000 K warranty, but under 3 years, I think VW must bear the cost because of the high failure rate of these items.
This isn't the first issue i've had, I also experienced what seemed like a turbo cut out and the car went into limp home mode, restarting worked for a while but the problem always came back. It took the VW dealer 2 goes to fix, first diagnosis was accelerator sensor, it was replaced but the problem came back. I was then informed some mods were done which did fix this problem but the service dep had no record of the second visit......
If any one else had the turbo issue, do they know what was done to fix it?