[Mista V]

Hi all
I have recently upgraded from Apr stage 1 to stage 2. Since doing this, the engine management light is periodically coming on giving a MAF and Throttle position code. I originally had a single pulley upgrade which gave the fault after a few days. It comes up on my OBD11 as an inactive fault. After getting the crank pulley done, this is now more frequently showing but still as an inactive fault.
The fault comes up whether I am booting around or occasionally when I'm just sitting in London traffic.
Would appreciate any feedback or ideas.
2013 S5 3.0 V6 superchard APR stage 2 dual pulley and DSG Map, with forge full induction kit and cross delete

 

[Alex1990]

Induction kit could come up with faults sometimes after remap and that much free flow of air.
I installed a K&N performance air filter and had that exact issue and after going back to standard filter it was fine again and never came back up!

maybe helps, I don’t know!

~Alex

 

[Dippy]

@Mista V - on what information are you basing your comment that there is a MAF code? Your engine does not have a MAF sensor, it relies on pressure sensors for a calculation of air mass.

 

[Mista V]

@Mista V - on what information are you basing your comment that there is a MAF code? Your engine does not have a MAF sensor, it relies on pressure sensors for a calculation of air mass.

I have an OBD11 device. It's giving me the info

 

[Mista V]

Induction kit could come up with faults sometimes after remap and that much free flow of air.
I installed a K&N performance air filter and had that exact issue and after going back to standard filter it was fine again and never came back up!

maybe helps, I don’t know!

~Alex

Thanks for your response mate

 

[Mista V]

@Mista V - on what information are you basing your comment that there is a MAF code? Your engine does not have a MAF sensor, it relies on pressure sensors for a calculation of air mass.

So I had it come up again today and it actually says MAP/MAF if that makes sense.
Thanks for any advice you can give Dippy
👊

 

[Dippy]

What is the code?
Is your drive ratio the same as the APR map expects (i.e. do you have the same size pulleys as in the APR package that uses the same map file)?

 

[Mista V]

What is the code?
Is your drive ratio the same as the APR map expects (i.e. do you have the same size pulleys as in the APR package that uses the same map file)?

So the top pulley is a forge pulley and the crank is Apr. If I remember right, the top pulley is 0.25 mm less than the APR equivalent. All the work has been done by the same people - Wrench Studios - who said that there is no problems having the setup.

 

[Dippy]

0.25mm might not seem much but it could account for about a 100 rpm increase in supercharger revs at the top end. You might need to check with APR.

 

[Mista V]

0.25mm might not seem much but it could account for about a 100 rpm increase in supercharger revs at the top end. You might need to check with APR.

So I've spoken to the tuning place who have claimed that the APR map was adjusted to allow for the smaller size pulley. They reckon it could be an air leak and have said to bring it back to them so they can have a look for any leaks obviously charging for garage time. I'm not too convinced so I'm gonna email APR as you suggested. I'll post their reply when I get it.
Thanks for your input Dippy, hopefully I'll get an answer from them and get her running properly. Watch this space

 

[Dippy]

I'm not an expert but there are not many reasons for an air leak for the V6 TFSI supercharged engine that would not cause other problems and other codes. There are seals between the supercharger and the manifold but I can't say that I have read reports of them failing. Has your supercharger been removed at any point? What I have read are some reports over on Audizine of people having issues with APR SW, and AFAIR there was usually some sort of "mix-and-match" going on. But that's the general risk if you don't use a tuner's complete package.

 

[Mista V]

I'm not an expert but there are not many reasons for an air leak for the V6 TFSI supercharged engine that would not cause other problems and other codes. There are seals between the supercharger and the manifold but I can't say that I have read reports of them failing. Has your supercharger been removed at any point? What I have read are some reports over on Audizine of people having issues with APR SW, and AFAIR there was usually some sort of "mix-and-match" going on. But that's the general risk if you don't use a tuner's complete package.

Hi Dippy
No my supercharger has not been removed as far as I am aware. I've only had her for two years so can't really vouch for prior to my ownership however she came with lots of paperwork and there is nothing like that there. I haven't had a reply from APR for some reason, and since my last post the fault hasn't reared its ugly head again. At the moment I think the best thing I can do is get the APR pulley and get it swapped out. I'm going Santa Pod in June for RWYB so I'll try and get it changed by then.
If that rectifies it then it looks like a bad move from the original tuners, I think I'll try someone else to get it changed.
I'll update the post once it's done and I've had her rolling for a while
Thanks for all your input I really appreciate it

 

[Mista V]

Hi all

Forgot to update the post. The problem was loose clips on the air filter and induction pipe. Found this out when going to remove and clean filter. All 3 of the clips were loose so tightened up and since then, no error repeats at all.
Like to thank all of you who took the time to read and reply, really appreciate it