[pheno]

Actually I should code some viewer into TestO

[iaknown]

Lemme rephrase my statement.....DWR is right, there certainly are differences between the graphs, but in the 2nd and especially the 3rd it is very hard to see what is going on timewise. As he mentioned in the 1st graph it appears to be over the target boost but it is almost everywhere so I would be looking somewhere else other than the wastegate. The WG isn't used until higher rpms.

Go over your vacuum lines again. Check each one individually for breaks with a Mityvac or similar. Check your other 2 actuators the same way as well as the vacuum reservoir box in front of the pressure converters. Also you have a vacuum line going to an engine mount solenoid below the intake manifold and another to the EGR, give them a check as well. For the heck of it check both intercooler/charge pipe connections. They can look connected but may not be clipped in. Ask me how I know.....

Originally Posted by pheno

Actually I should code some viewer into TestO ��

Now that would be cool!

[35d]

Originally Posted by iaknown

Lemme rephrase my statement.....DWR is right, there certainly are differences between the graphs, but in the 2nd and especially the 3rd it is very hard to see what is going on timewise. As he mentioned in the 1st graph it appears to be over the target boost but it is almost everywhere so I would be looking somewhere else other than the wastegate. The WG isn't used until higher rpms.

Go over your vacuum lines again. Check each one individually for breaks with a Mityvac or similar. Check your other 2 actuators the same way as well as the vacuum reservoir box in front of the pressure converters. Also you have a vacuum line going to an engine mount solenoid below the intake manifold and another to the EGR, give them a check as well. For the heck of it check both intercooler/charge pipe connections. They can look connected but may not be clipped in. Ask me how I know.....

Now that would be cool!

Ok I will try to fix those graphs. The logs/graphs just were from stationary to random speeds while driving, slowing down then wot and then slow and wit again etc.

Vacum lines I've changed everyone apart from two under intake manifold but I tested those and they still sucking vacum. 2 weeks ago changed them, charge air hose shows no leaks, I will remove all underneath covers and look from there for any hoses off.
My car is remaped and boost set to 3.0mbar and single value boost limiter 3.1mbar so actual boost should be higher then desired boost across all Rev range but not higher then 3000mbar?
I was thinking removing the dpf has caused the increased boost but I didn't log before removing dpf. I tried with stock map but still boost reaches 3300mbar

Does anyone know how to record in dis like this video?

This guy in comments said it was map which did not have dpf removed in software correctly but he never fixed issue

[35d]

Is this any better. This without constant vacum

[DWR]

Originally Posted by 35d

Does anyone know how to record in dis like this video?

That is a much slower sampling rate. Not sure why you would want to do that.

[DWR]

Originally Posted by 35d

I tried with stock map but still boost reaches 3300mbar

That's really helpful information. I don't recall anyone having a boost issue with the stock map and DPF removed. I think iaknown's recommendation of using a usb camera will head you in the right direction - sounds like an actuator issue.

[iaknown]

Originally Posted by 35d

Ok I will try to fix those graphs. The logs/graphs just were from stationary to random speeds while driving, slowing down then wot and then slow and wit again etc.

Vacum lines I've changed everyone apart from two under intake manifold but I tested those and they still sucking vacum. 2 weeks ago changed them, charge air hose shows no leaks, I will remove all underneath covers and look from there for any hoses off.
My car is remaped and boost set to 3.0mbar and single value boost limiter 3.1mbar so actual boost should be higher then desired boost across all Rev range but not higher then 3000mbar?
I was thinking removing the dpf has caused the increased boost but I didn't log before removing dpf. I tried with stock map but still boost reaches 3300mbar

Do you still have the dpf? May be worth putting it back on to help nail down the issue. Even with a stock map though you may still get the overboost even if all is ok, hard to say. Yyou may be experiencing the same thing I did in which case you will need to mod your wastegate port.....

[iaknown]

Also, you may want to try a new boost pressure sensor. Very weird that actual boost is considerably higher than requested almost across the board....

[35d]

Originally Posted by iaknown

Also, you may want to try a new boost pressure sensor. Very weird that actual boost is considerably higher than requested almost across the board....

Should that not be right as the car is remaped and boost increased

[35d]

Here some more logs

Dpf off with stock map







Remap and dpf off





Useless graph remap and dpf off

[pheno]

Originally Posted by 35d

Here some more logs

Dpf off with stock map

For the actual problem I don't have any idead but if you want to send the logs to me I can open them in Megalogviewer and post pics here. Just trying to help Thanks. phenotesto at gmail.com

[iaknown]

Originally Posted by 35d

Should that not be right as the car is remaped and boost increased

No, the remap is written to request higher boost and the actual boost should match that. You still shouldn't be overshooting boost at lower rpms anyway, remap or not.

[35d]

Ok what could be causing that

Today I tried to more maps. One stock map with dpf deleted( dpf was deleted by diffrent tunner )





Second map was same map which on car now with 3.1bar and boost tables adjusted





Both maps still show over boost at high rpm

[35d]

Can someone else do any logs please so I can compare, would be much appreciated

I'm using testo with standard settings, just logging actual and desired boost also rpm

[iaknown]

What does your boost sensor read with the engine off and at idle? You can also pull it and put LIGHT air pressure to it in increments (under 35 psi) while doing a log. You need to start ruling other things out individually, start with the boost sensor.

[Yozh]

Hey, I think your graphs are a bit wierd as you are overshooting desired pretty much across all the rpm range. Could be the tune, really.

For the whole vacuum control thing, I'm sure you have checked everything. It is very important you do not have any vacuum leaks anywhere, checked all your pressure converters and electric actuators and mechanically tested the flaps and actuators.

For the camera mounting, it is really difficult as there is virtually no space. Not sure what the best spot would be. May be facing back from the vacuum actuator for the wastegate. May be others will have an idea. As i had mentioned before. I had read, but have no first hand experience, that on European cars if you move your vacuum canister to the side and remove the turbo heatshield, you can see the wastegate actuator rod with a flashlight. I was not able to replicate that on my car with all the top paraphernalia removed.

Originally Posted by iaknown

What does your boost sensor read with the engine off and at idle? You can also pull it and put LIGHT air pressure to it in increments (under 35 psi) while doing a log. You need to start ruling other things out individually, start with the boost sensor.

Also, an intake temp sensor. Lots of weird issues are attributable to that one.

[DWR]

Of course, you could also get a mechanial gauge and do some redneck datalogging to verify the reading - I seem to recall a certain individual tracking down a boost issue that way.

[Yozh]

Is the "ladedruck ist" the actual and "soll" the requested? If so, I'm wondering why the drop off on actual is so gradual at the bottom of the graph.

I'm thinking its the remap. But that still does not explain why you are not matching at lower rpm with the stock programming.

[35d]

What is the boost sensor called in INPA or DIS?

The remap does not really matter as even with stock map it is over boosting low down and high rpm. A boost leak should it be heard or felt as car pulls strong.

I'm pretty sure removing the dpf has caused the actual boost to be higher then requested. The ecu must be expecting some sort of back oressure but it not there so tuebo spinning faster then the map expects.

If anyone else with dpf remobed can log some data also in testo then it would be very good ruling out that something else is the issue

[DWR]

Originally Posted by 35d

The ecu must be expecting some sort of back oressure but it not there so tuebo spinning faster then the map expects.

You are showing overboost at low boost and rpm. It is hard to envision much back pressure under those conditions.

[35d]

With the engine off the requested boost shows 1000 and actual 1025. When checked it was around 1019 atmospheric at my location

The low boost is not as high as when at high boost and high rpm

Anyone else got some logs?

[TDIwyse]

Originally Posted by 35d

Anyone else got some logs?

Here's a fairly recent log that includes a brief time before and after a full fueling pull (I usually export the log file and process it with a spreadsheet to make the data easier to read).

This is with a fully open exhaust but using an external wastegate to control overboost. It's using Jarek's v1.0 experiemental remap and includes lots of H2O/methanol injection.

I added rpm to the plot as I noticed the areas at low boost where the "actual" is over the set point are places where the vehicle is coasting...