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Deleted member 114318
Guest
Greetings from Norway!
No luck getting any help here in Norway, so figured out trying here . Been lurking here for a couple of months, so much good information. But haven't found a solution for the problem I have.
First of all, I have an chipped 1999 S3 APY with some mods and uprated parts:
- TFSI Coils
- N249 Delete
- SAI Delete
- DeatschWerks DW65v fuel pump
- Forge 008p Diverter Valve
- Silicone TIP
and some parts recently changed: MAF, N75, Sparkplugs (NGK PFR6Q), fuel filter, lots of vacum lines.
The problem I have is boost in the higher gears 4-6. First, second and third gear is boosting as they should, 1.5 bar/21 psi. Getting around 200g/s at the maf. Here's a graph I made after some logging in 3rd gear, everything looks good.
But as fast as I shift into 4th gear, things start to look weird.
When I reach 3000 rpm, I lose boost, 1.5 bar falls down to 0.9/1.0 bar. And then the funny part is, when I reach 5000 rpm the boost comes back. As the graph shows, the ECU starts to request 2500 mbar. Same thing in 5th and 6th gear. Hope these graphs helps to visualize my problem.
I have tried to change a lot of parts as mentioned above, done a boost leak test with no leaks, no fault codes.
So the only thing that I can think of is bad map. The turbo is a bit old/worn, but I don't think it is an issue since it boosts fine after 5000k? Any suggestions? I am really close to go get a new map Just scared it is not the issue
I have cvs files for most runs in different gears if anyone wants to take a look. My graphs are based on them.
Thanks
Victor
No luck getting any help here in Norway, so figured out trying here . Been lurking here for a couple of months, so much good information. But haven't found a solution for the problem I have.
First of all, I have an chipped 1999 S3 APY with some mods and uprated parts:
- TFSI Coils
- N249 Delete
- SAI Delete
- DeatschWerks DW65v fuel pump
- Forge 008p Diverter Valve
- Silicone TIP
and some parts recently changed: MAF, N75, Sparkplugs (NGK PFR6Q), fuel filter, lots of vacum lines.
The problem I have is boost in the higher gears 4-6. First, second and third gear is boosting as they should, 1.5 bar/21 psi. Getting around 200g/s at the maf. Here's a graph I made after some logging in 3rd gear, everything looks good.
But as fast as I shift into 4th gear, things start to look weird.
When I reach 3000 rpm, I lose boost, 1.5 bar falls down to 0.9/1.0 bar. And then the funny part is, when I reach 5000 rpm the boost comes back. As the graph shows, the ECU starts to request 2500 mbar. Same thing in 5th and 6th gear. Hope these graphs helps to visualize my problem.
I have tried to change a lot of parts as mentioned above, done a boost leak test with no leaks, no fault codes.
So the only thing that I can think of is bad map. The turbo is a bit old/worn, but I don't think it is an issue since it boosts fine after 5000k? Any suggestions? I am really close to go get a new map Just scared it is not the issue
I have cvs files for most runs in different gears if anyone wants to take a look. My graphs are based on them.
Thanks
Victor