P2565 - Audi A3 BNM 170bhp

[Stevey Y]

19 hours ago, ash_BNM said:

So after fighting with this fault, I finally got somewhere but still not sorted.

 

Replaced N95 valve same problem.

Replaced actuator as wasn't holding with my vac tester so now holding vac using vac tester and found fault but slightly different.

Adjusted actuator, same issue again different pattern of glow plug light flashing so then went and adjusted again but this time I done it using the vac tester using the following :-

Vac tester connected to actuator and saw actuator started moving at 10hg and didn't hit full open until 25hg

Adjusted actuator so it started moving at 4hg and stopped at around 18-20hg and now the light is gone but comes on intermittently but I now have good boost and car runs ALOT smoother!

I reckon a bit more tweaking and this fault is now solved.

I don't know how to read the voltage readings on the vcds for the actuator so if anybody knows how I can get this actuator spot on then please let me know.

Thanks all.

 

 

 

 

Hi when the turbo is built they go into a flow tank with coloured air which is read by a photo cell that determines the optimum flow rates at different rpms, then when a balance is achieved the adjuster nut is locked in that position I was lucky enough to watch the Mitsubishi unit being rebuilt and calibrated for my Mondeo at the local turbo specialists,  I don't think anyone will be able to give you an exact formula for adjustment as they all differ when built as most turbos [Garret] are built in Italy, best idea is have it rebuilt and let the company who is doing it set it up as they will have the tank to do it and you will have a perfect turbo.

Steve.

[Stevey Y]

Hi have look at youtube on the my turbo diesel site they set theirs with the vacuum gauge you have.

Steve.

[ash_BNM]

We have some positive news.

Looks like this is the best this car has run in a long time!

I am obviously driving this with a big smile on my face now when you have the 170bhp engine kicking strong.

So from the start I found the actuator was leaking off air and not holding when tested using vac tester and I replaced this with a spare engine my friend had for a couple of drinks and roughly coping the thread sizes etc when putting it back on.

I then replaced the MAF from a spare golf 140bhp BKD( same part numbers) with these two parts the car got better.

I still had the hiccup on taking off from stop and flat out on the motorway the hiccups followed through on occasion with lacking power.

Finally giving I decided to change the fuel filter - it was completely covered.

Started it up after priming and right from the idle I knew I was getting somewhere now so took it for a drive and praise the lord I had boost kicking in at 2.5k pulling the car effortlessly.

The actuator then had a bit of adjustment after reading Google and YouTube I found with the vac pump set it so around 4hg it starts moving actuator and shuts at around 18hg( still need help checking the recommended voltages to make sure it's 101% set to parameters)

I have now forgotten what the EML light looked like 🙂

Now just some tweaking left with a nice oil and filter change, add some VCDS tweaks, polish the car, alloys refurbed, and a dent sorted. 

Also, the DSG is behaving and crazy how it changes gears so quickly on full acceleration.

Thanks for all your help Steve.

Edited December 6, 2021 by ash_BNM

[Stevey Y]

42 minutes ago, ash_BNM said:

We have some positive news.

Looks like this is the best this car has run in a long time!

I am obviously driving this with a big smile on my face now when you have the 170bhp engine kicking strong.

So from the start I found the actuator was leaking off air and not holding when tested using vac tester and I replaced this with a spare engine my friend had for a couple of drinks and roughly coping the thread sizes etc when putting it back on.

I then replaced the MAF from a spare golf 140bhp BKD( same part numbers) with these two parts the car got better.

I still had the hiccup on taking off from stop and flat out on the motorway the hiccups followed through on occasion with lacking power.

Finally giving I decided to change the fuel filter - it was completely covered.

Started it up after priming and right from the idle I knew I was getting somewhere now so took it for a drive and praise the lord I had boost kicking in at 2.5k pulling the car effortlessly.

The actuator then had a bit of adjustment after reading Google and YouTube I found with the vac pump set it so around 4hg it starts moving actuator and shuts at around 18hg( still need help checking the recommended voltages to make sure it's 101% set to parameters)

I have now forgotten what the EML light looked like 🙂

Now just some tweaking left with a nice oil and filter change, add some VCDS tweaks, polish the car, alloys refurbed, and a dent sorted. 

Also, the DSG is behaving and crazy how it changes gears so quickly on full acceleration.

Thanks for all your help Steve.

Hi no problem, its just a bit frustrating when you can't physically see the vehicle and are just hoping you are giving some advice that may help, thank you for publishing what did and did not work this will at least give someone else in your position a few options they might not otherwise have been aware of.

Steve.