My second T4, operation de-chav

[regcheeseman]

One logrun could tell you all that's needed to know.

Really - it's that simple???

As we've got no electronic data I'm not ruling anything out and I'm also offering you a backup.

I'm trying to come at the problem from a purely fundamental diesel technology approach and nothing really adds up??

The boost peaking and dropping is just plain odd - almost as though there's a pressure related leak in the gauge itself - but if that was the case, how come when I removed the wastegate operation did I get a steady build of boost to around 14 psi (indicated) at which point the ECU rudely interjected

Do you want another pump to prep?

Not really! I see a lot of pumps and beginning to get bored of them - I've a JX pump split on the bench and another AAZ in waiting, it's not just doing them, it's the stupid fucking questions you get before and after doing them. There's been a few gems just recently...

[arfur fox-acre]

would love to here them gems

[Activ8]

Really - it's that simple???

Its a very good starting point!
It will indicate the basics, AIr / Fuel / Pressure and an rpm point IF the ECU's taking over and WHAT its taking over.

I'm trying to come at the problem from a purely fundamental diesel technology approach and nothing really adds up??

The boost peaking and dropping is just plain odd - almost as though there's a pressure related leak in the gauge itself - but if that was the case, how come when I removed the wastegate operation did I get a steady build of boost to around 14 psi (indicated) at which point the ECU rudely interjected

Did you remove and cleanup the Volvo actuator? Mine had to come off for cleaning and reseating.
Fit an MBC pre-set off the van to 18-20psi.
Colin01332 is popping over at 12 and I can update myself with the setup and some figures.
If we get 5 I'll try and get a logrun in his so we have a set-up comparison.

Not really! I see a lot of pumps and beginning to get bored of them - I've a JX pump split on the bench and another AAZ in waiting.

I was referring to lending you another pump to try / refurb / replace yours with while allowing you to continue driving the van.

... it's not just doing them, it's the stupid fucking questions you get before and after doing them. There's been a few gems just recently...

Theres always a learning curve for everyone, at least you'll be giving them a straight answer!

[Activ8]

Colin01332 is popping over at 12 and I can update myself with the setup and some figures.

Colin01332 wasn't able to come over but the map holds pressure at 1.3-1.4bar (18.85-20.3psi) and continues to get 600+ miles out of tank.
We're meeting up on Friday.

[Activ8]

Email sent with new Volvo map.
Keep me posted.

[regcheeseman]

Email sent with new Volvo map.
Keep me posted.

Thanks,

Went out to the garage last night.....

Emptied the tumble drier and folded the clothes,

Sorted the recycling,

Stuck battery on charge

Spotted the boys bike had the chain well and truly jammed between cassette and hub, eventually got it out, derailleur is mangled and hitting spokes, stripped chain and binned it, repaired rear mech and by that time it was too late and cold top touch the van.

All the while I was doing it though I was pondering the van symptoms and possible reasons and keep coming down to a lack of fuel causing it..... so if the map sensor was reading too high (when under pressure) that would kill fuel?

yes yes I know - just do the blooming log run!

I just like to ponder these things in my head and try to make some sense of what is going on

[Activ8]

I was pondering the van symptoms and possible reasons and keep coming down to a lack of fuel causing it.....
so if the map sensor was reading too high (when under pressure) that would kill fuel?

Yes.
If the pressure exceeded the MAP sensor limit 2.5 bar (ATM+1.5bar) (although from experience the sensor limit is more 2.6 bar)
Or, because the pressure exceeded the maps SVBL (Single Value Boost Limit), of 2.3 bar on your current map for T4 K14, 2.5bar on the new map.
Or because the pressure exceeded the requested boost target or boost limit as defined in the two boost maps.

yes yes I know - just do the blooming log run!

Well it does make sense to use the tools available to read the ECU's interpretation of the sensor data!

Reckon we move away from my test map, and tie down the map to your van specifically.
All checksums are good on the new map.
So, if you're install is still throwing up an error on VCDS, its in the hardware being used.

I had a quick chat with Colin01332 yesterday as he's been running my more aggressive map with the Volvo turbo install since 05/12/17.
Its running fine on the Stanadynes, an OEM TMIC and holding boost at 1.3-1.4 bar.
I hasten to add we haven't revisted the N75 map since install so we could get a little improvement.
Top port on the actuator is capped. Mikalors are necessary!

So, you have the same map, re-calibrated to 5000rpm and the greatly improved airflow and higher pressures.
The N75 map is very different to the T4 K14, so this will change the current experience forTheres definately a logic flow and you.
It may not solve anything but it'll be a better starting point specific to your current set-up.

Then for f'sake do a f'in logrun! And a full log report on VCDS.

[regcheeseman]

So, if you're install is still throwing up an error on VCDS, its in the hardware being used..

It is and the flashy glow plug light is getting on my tits.

By hardware do you mean the ECU or the PC/leads?

I have been using my USB vag com commander lead but I could swap to the serial port lead and metal MPSS (?) box.



What's a logrun?

If the brown light is flashing and I need to drop the kids off at the pool urgently I tend to do an awkward walk rather than a 'run'

[Activ8]

It is and the flashy glow plug light is getting on my tits.

So you installed the new map?
What VCDS codes are now being recorded?

By hardware do you mean the ECU or the PC/leads?

I was originally referring to your VAG Commander set-up, but I suppose we cannot rule out the ECU being damaged.
Does the glowplug flash with the original map installed?
Might be a good idea to clear the errors , return to standard map, drive it the and rereview VCDS errors before new install?
Again, just as a process of elimination.

I have been using my USB vag com commander lead but I could swap to the serial port lead and metal MPSS (?) box.

The MPSS by all accounts as a read/writer (depends on version) is better than the VAGCommander.
Do a read using the MPSS and email it to me and I'll x-ref against the original file in 8-bit.
This might high-light any read/write defects in the VAGCommander set-up.

What's a logrun?
If the brown light is flashing and I need to drop the kids off at the pool urgently I tend to do an awkward walk rather than a 'run'

Its definately a predefined logic flow before you determine speed , time , stride and finally any backup.

[regcheeseman]

So you installed the new map?
What VCDS codes are now being recorded?

I was originally referring to your VAG Commander set-up, but I suppose we cannot rule out the ECU being damaged.
Does the glowplug flash with the original map installed?
Might be a good idea to clear the errors , return to standard map, drive it the and rereview VCDS errors before new install?
Again, just as a process of elimination.

The MPSS by all accounts as a read/writer (depends on version) is better than the VAGCommander.
Do a read using the MPSS and email it to me and I'll x-ref against the original file in 8-bit.
This might high-light any read/write defects in the VAGCommander set-up.

Not loaded new map or returned to old yet - I will drop back to original to try to remove the flashy light.

Probably have damaged ECU - If only I had a cloned spare.....

Out of interest when you send me files they have no .bin suffix so I just add it - is that the right thing to do?

What's a logrun?
If the brown light is flashing and I need to drop the kids off at the pool urgently I tend to do an awkward walk rather than a 'run'

It's definitely a predefined logic flow before you determine speed , time , stride and finally any backup.

All well and good but if your timing is out, you may find that you go into limp mode.

[Activ8]

Not loaded new map or returned to old yet - I will drop back to original to try to remove the flashy light.
Probably have damaged ECU - If only I had a cloned spare.....

I'm sure the ECU's fine.
It could be the programmer adding in some extras...

Out of interest when you send me files they have no .bin suffix so I just add it - is that the right thing to do?

The files are saved as *.bin format , just had a look and because my naming convention often has more than one full stop saved e.g. "v1.0" before the *.bin suffix, Windows is seeing the first full stop as the file label.
I'll modify my naming convention .... for your files to Cheesey1 , MoreCheese , CheesePlus , CheesePlus+

All well and good but if your timing is out, you may find that you go into limp mode.

And if the roadside check indicates serious failure, you'll need specialist recovery.

[Activ8]

Don't suppose somewhere that supplies the 5 pot exhaust manifold flange that isn't the place that turns out faulty or poorly made bits - FFS a flywheel with no TDC mark, I mean why? why would it even be an option on a flywheel that you have to request a TDC mark?

Did you get any updates on 5-1 merge pipework Reg?
Or the 5 pot manifold flange blanks?

[regcheeseman]

Did you get any updates on 5-1 merge pipework Reg?
Or the 5 pot manifold flange blanks?

I didn't...

Planning to mock both flanges up in CAD and then get a few laser cut by my friendly laser cutter - need anything? Any bits you want cutting as there's an MOQ and it's always good to make economical use of a sheet of material.


Tomorrow I finish work early and I'm gonna take the laptop with me in the van....

[Activ8]

I didn't...
Planning to mock both flanges up in CAD and then get a few laser cut by my friendly laser cutter - need anything?
Any bits you want cutting as there's an MOQ and it's always good to make economical use of a sheet of material.

Yes please.
What material are you proposing? What thickness?

My shopping list would be 3x exhaust flanges and some turbo flange adaptors if its 12mm thick min.
AJT to Merc KKK , AJT to T25, T25 to Garret Merc , T25 to Garrett BMW , T25 to T3 , T25 to T4

Tomorrow I finish work early and I'm gonna take the laptop with me in the van....

Sounds good. I'll be on standby to assist and help you work on the file tomorrow.
Using the latest map?
Installed using MPPS?
Remember to record the pre-start "faults", clear and then the post run "faults".

[regcheeseman]

Yes please.
What material are you proposing? What thickness?

My shopping list would be 3x exhaust flanges and some turbo flange adaptors if its 12mm thick min.
AJT to Merc KKK , AJT to T25, T25 to Garret Merc , T25 to Garrett BMW , T25 to T3 , T25 to T4

Sounds good. I'll be on standby to assist and help you work on the file tomorrow.
Using the latest map?
Installed using MPPS?
Remember to record the pre-start "faults", clear and then the post run "faults".

I'm using the first volvo map you sent at the moment

Installed with Vag can commander

Don't standby though - I've got other things to do.... a different build thread