Sticking Boost Pressure Actuator?

[SeanC]

Came home after 2 weeks away jumped into the D3 and got an “engine system fault”.
IID Tool logged the fault code below.

F6BD0A2E-A9DE-41BF-92DD-88F43B85B1D5.jpg

Measured the boost pressure actuator value out onto the highway and back. The value didn’t change.

Is this the stuck actuator that most people talk about.

About 4 years ago the mechanic freed up the “waste gate valve”.

Would this be the same thing? I read that a D3 doesn’t have a waste gate valve.

If so, will raid the cupboard for a coat hanger and have a go at freeing it up.

Thanks
Sean

[Dagilmo]

Hi Sean,

Sorry, I can't help with turbo question. Hopefully someone will be along soon with a reply.

My question is how was your experience with the BAS remap? How has the performance improved?

Cheers David.

[SeanC]

All sorted. Found the only wire coat hanger in the house. Add to that a can of penetrant spray, a can of lanolin spray and YouTube, now running better than before I went away. This is going to be monthly maintenance job.

If you have to do it use this video. YouTube
Others have them dismantling half the car.
This one you put the car at off-road height. Remove a heat shield. Spray the actuator with penetrant and use the coat hanger tool to pull the actuator back and forth. When moving freely spray with lanolin spray. Replace heat shield. All done.

If anyone is tossing up whether to buy an IID Tool due to cost, this saved me a day off work and $?? at the mechanics and this isn’t the first time. It really should be one of the first accessories purchased.

[SeanC]

Hi Sean,

Sorry, I can't help with turbo question. Hopefully someone will be along soon with a reply.

My question is how was your experience with the BAS remap? How has the performance improved?

Cheers David.

Hi David,

Definitely more responsive. Better acceleration off the mark and in the low to mid rev. range.
Don’t know about fuel economy as I fitted roof racks at about the same time.
I definitely think it is worth it.

[Eric SDV6SE]

If anyone is tossing up whether to buy an IID Tool due to cost, this saved me a day off work and $?? at the mechanics and this isn’t the first time. It really should be one of the first accessories purchased.

Yep, GAPIID BT vs the Blackbox Rovacom IQ, leaning towards the latter, still researching. Agree it’s a must have, I’ve been lucky so far that I’ve had access to a workshop quality code reader, but nothing when we’re away remote.

[Eric SDV6SE]

Came home after 2 weeks away jumped into the D3 and got an “engine system fault”.
IID Tool logged the fault code below.

F6BD0A2E-A9DE-41BF-92DD-88F43B85B1D5.jpg

Measured the boost pressure actuator value out onto the highway and back. The value didn’t change.

Is this the stuck actuator that most people talk about.

About 4 years ago the mechanic freed up the “waste gate valve”.

Would this be the same thing? I read that a D3 doesn’t have a waste gate valve.

If so, will raid the cupboard for a coat hanger and have a go at freeing it up.

Thanks
Sean

i don’t know the D3 turbo as well as the D4, but i understand it’s a standard fixed vane turbocharger. It should also have a waste gate actuator that is air pressure controlled to release pressurised air during gear shifts, the characteristic “whistle” from a turboed engine.

[BradC]

i don’t know the D3 turbo as well as the D4, but i understand it’s a standard fixed vane turbocharger. It should also have a waste gate actuator that is air pressure controlled to release pressurised air during gear shifts, the characteristic “whistle” from a turboed engine.

Nope. The D3 is a honking great single VVT turbo. No waste gate.

On any turbo charger with a waste gate it opens a bypass channel that allows the exhaust to circumvent the turbine. The "whistle" you refer to is a compressor bypass valve or blow off valve which lowers the outlet pressure relative to the inlet pressure to stop the compressor stalling when trying to compress against a closed throttle plate. Two completely different devices on opposite sides of the turbo.

[Eric SDV6SE]

Thanks Brad, So if a variable vane turbo, then only the one actuator to control the vane pitch?

[BradC]

Thanks Brad, So if a variable vane turbo, then only the one actuator to control the vane pitch?

Precisely. I've believe it has 3 failure modes. In the UK and other countries where they salt the roads the actuators corrode. Everywhere else the vanes get gummed up with carbon, and rarely the actuators fail.

Apparently LR issued an ECU update years ago that cycles the actuator on shutdown to try and prevent the vanes clagging up. I can certainly hear mine do it (MY08 EU4). I forget where I read about the update for earlier cars.

Thankfully the PO shelled out for a new turbo not long before I bought the car, so it's not something I should have to contend with for a while.