[Chipmik]

Could someone please check & tell me their turbo-pressure at:

1. 750 RPM, unloaded
2. 1000, unloaded
3. 1500, unloaded and fully loaded. (like in 6. Gear & going uphill, please be pretty exact on the RPMs so its not like 1800 where mine seems to be ok )

I think my VNT-vanes are stuck to a degree where they dont work at low RPM/loads.

Thank you

Attached now i a printout of RPM/Boostpressure/Desired boostpressure....Strange thing is that the VNT-solenoid-arm seems to move as it should with approx 1 cm of movement...

 

[Chipmik]

Could someone please check & tell me their turbo-pressure at:

1. 750 RPM, unloaded
2. 1000, unloaded
3. 1500, unloaded and fully loaded. (like in 6. Gear & going uphill, please be pretty exact on the RPMs so its not like 1800 where mine seems to be ok )

I think my VNT-vanes are stuck to a degree where they dont work at low RPM/loads.

Thank you

Attached now i a printout of RPM/Boostpressure/Desired boostpressure....Strange thing is that the VNT-solenoid-arm seems to move as it should with approx 1 cm of movement...

Now updated with printout from MES.

 

[Old Engineer]

At those RPM rates the torque through the gearbox will be awful. Didn't I read somewhere that the ECU limits the Turbo to protect the gearbox?

 

[BuonGiorno]

6th gear with 1500revs would results something like 70-75km/h velocity.
Do not drive this way since it kills gearbox especially car loaded.
Gearbox repair is also quite pricy.

 

[goram]

6th gear with 1500revs would results something like 70-75km/h velocity.
Do not drive this way since it kills gearbox especially car loaded.
Gearbox repair is also quite pricy.

Never mind that, what a cracking photo!

 

[Chipmik]

Never mind that, what a cracking photo!

Hey guys, thank you so much for your replys..But i am/was trying to figure out what the problem is with my car..Not in any way how i would drive on a daily basis...Just trying to find out how she should behave if healthy. (first 3 RPMs i asked for was unloaded, meaning not in any gear, just readout of manometer at standstill )

But can see from the MES that she seems to be 200 mBar to low ad idle & overshooting at higher RPM´s. Which puzzles me due to VNT-actuator moving when stationary :-(

 

[BuonGiorno]

Gearbox interior is lubricated by revs.
Continuous drive at smaller revs with high gear would result an accelerated wear.
Well... 24jtdm-er gearbox is much tough than 19jtdm-er one.
It is just a time issue for mpg- eager guy.
For OP.
I have never faced personally with VNT issues. Sure you mean varyable geometry turbo.
My view it does not work at 750-1000 revs. To be checked higher. But again, not a guru here.

 

[Chipmik]

Gearbox interior is lubricated by revs.
Continuous drive at smaller revs with high gear would result an accelerated wear.
Well... 24jtdm-er gearbox is much tough than 19jtdm-er one.
It is just a time issue for mpg- eager guy.
For OP.
I have never faced personally with VNT issues. Sure you mean varyable geometry turbo.
My view it does not work at 750-1000 revs. To be checked higher. But again, not a guru here.

Please stop this gearboxtalk...I know your trying to be kind & save my gearbox. I NEVER (under normal non-faultconditions) accelerate hard in 5/6. gear below 2-2200 RpM , but i would really like this to stay on topic...

I my (danish) world, VGT/VNT is potato/potato....

 

[BuonGiorno]

Yes!... of course... sorry if any... Just react for eventual GB ( GearBox :biglaugh: ) answer...
If you are VGT specialist, why do not you treat it yet ???...
If not, why do not you describe what is felt faulty with your car behavior from driver seat ???...
Sure VGT is not quite common issue to be easily discussed free.

 

[BuonGiorno]

ЗЫ... just mean that your question might not have practical sence...
All diesals here are different. EGR off, DPF off, both EGR/DPF off, different kind of remaps involved.
So, it would not be plausable enough.

 

[Chipmik]

The guys that might be able to help me with what could cause this, should have no big need for more when looking at the MES-printout and told VNT move on request & still not creating requested pressure at low RPM...No matter what DPF/EGR or remap...You could have a pont on EGR but that is blanked with a plate.

 

[halftone]

If your VNT is like mine (147 1.9 16v 150bhp)1cm movement at the arm indicates sticking. Mine was like that. After stripping it was obvious that rust on the inside of the housing was jamming the vanes. After fixing this the movement is about 2.5 cm. Testing with a vacuum pump the arm begins to move at about 2cm Hg, moves linearly with increasing vacuum and is against the stop by 17cm Hg. Specified range of the actuatorv is 0-20cm Hg. It drives great now.

 

[Chipmik]

If your VNT is like mine (147 1.9 16v 150bhp)1cm movement at the arm indicates sticking. Mine was like that. After stripping it was obvious that rust on the inside of the housing was jamming the vanes. After fixing this the movement is about 2.5 cm. Testing with a vacuum pump the arm begins to move at about 2cm Hg, moves linearly with increasing vacuum and is against the stop by 17cm Hg. Specified range of the actuatorv is 0-20cm Hg. It drives great now.

Thanks Halftone

Mine has a Honeywell-Garrett GTB2056V & "Elearn" states that: Visually inspect that during start-up, the turbocharger actuator connecting rod (turbine stator vanes adjustment device) moves by around 10 mm in the direction of the actuator.

So think play is ment be a lot less on mine...Going offshore tomorrow but will try Mr. Muscle on the VNT as next when im back in 2 weeks time. Theres actually vacuum in my manifold at idle (as shown on printout), compared to the requested pressure, which is approx. the same as the baro-measurements from the sensor inside the ECU.

 

[Aramis]

Never mind that, what a cracking photo!

Agreed. Hope that is not photoshopped...

 

[Chipmik]

Agreed. Hope that is not photoshopped...

Nope. real deal :biglaugh: But shes been acting like this ever since cambelt snapped 6000 Miles ago (Timing trippel-checked as a tooth off on the belt was my big concern/initial thought!)...No wonder shes also a bit down on the MPG with no support at low revs.

 

[halftone]

Thanks Halftone

Mine has a Honeywell-Garrett GTB2056V & "Elearn" states that: Visually inspect that during start-up, the turbocharger actuator connecting rod (turbine stator vanes adjustment device) moves by around 10 mm in the direction of the actuator.

So think play is ment be a lot less on mine...Going offshore tomorrow but will try Mr. Muscle on the VNT as next when im back in 2 weeks time. Theres actually vacuum in my manifold at idle (as shown on printout), compared to the requested pressure, which is approx. the same as the baro-measurements from the sensor inside the ECU.

Yes, the 1.9 has the smaller GT1749V turbo, but eLearn says exactly the same - 10mm movement. On this turbo it is definitely 20-25mm for full opening and closing, and mine has no slop or wear that might explain that so I believe eLearn is telling fibs. That "10mm" is why I didn't realise there was a fault until I removed the turbo and could see better, I could feel it move that much on the car. What I'd missed was that the arm never got within ~1cm of the adjustable stop. It should pull in so it touches the stop with high vacuum. More, and pics at http://www.alfaowner.com/Forum/14300937-post218.html

The best way to check is to use a vacuum pump to check you have full, linear actuator movement within the range 0-20cm Hg. One of the cheap Chinese clones of a Mityvac, £15 on eBay, works fine here.

 

[Chipmik]

Yes, the 1.9 has the smaller GT1749V turbo, but eLearn says exactly the same - 10mm movement. On this turbo it is definitely 20-25mm for full opening and closing, and mine has no slop or wear that might explain that so I believe eLearn is telling fibs. That "10mm" is why I didn't realise there was a fault until I removed the turbo and could see better, I could feel it move that much on the car. What I'd missed was that the arm never got within ~1cm of the adjustable stop. It should pull in so it touches the stop with high vacuum. More, and pics at http://www.alfaowner.com/Forum/14300937-post218.html

The best way to check is to use a vacuum pump to check you have full, linear actuator movement within the range 0-20cm Hg. One of the cheap Chinese clones of a Mityvac, £15 on eBay, works fine here.

Thank you so very much Unbeliveable how many faults there are in Elearn & even on specific measurements :-(

Unfortunately it will be like 3 weeks before i can play with her again, but will reply back with results then

You dont happend to have a link to those pumps as an example?

 

[halftone]

Emuddle, I call it. Just don't mention head bolt torques.

The pump is http://www.ebay.co.uk/itm/281357793883 - it's now a mere £5! I paid £12.83 and the seller was good. I got a cam timing/locking kit at the same time,£15 something, most are selling the identical kit for £20-30. It worked perfectly. But many others sell the same pump.

 

[TimBud]

Please stop this gearboxtalk...I know your trying to be kind & save my gearbox. I NEVER (under normal non-faultconditions) accelerate hard in 5/6. gear below 2-2200 RpM , but i would really like this to stay on topic...

Chill Chipmunk. Just be patient... you're getting all this advice for free.
You've asked for help on a web forum populated by 99.999% amateurs and you'll get a lot of conflicting info even from supposed professionals. Of course its going to go off topic- I'm surprised no one's mentioned that Trump might be the problem yet.

 

[goram]

Nope. real deal :biglaugh: But shes been acting like this ever since cambelt snapped 6000 Miles ago (Timing trippel-checked as a tooth off on the belt was my big concern/initial thought!)...No wonder shes also a bit down on the MPG with no support at low revs.

Not sure we're talking about the same photo!