S4istrouble

Hi

I have some problems with my S4. Runnes great until WOT, then it shutteres mostly from 2000 to 3000 RPM, but also furter up. I have made some pulls and logging with vag-com, so if these data says anything to you about what might be wrong or if you have an idea what block to log to get a clear view of what might be wrong please let me know.

For info I have changed the TTB but it was no defect, haven't done a leak test yet. My actual boost lays closly to the spec'd boost, so could it still be a leak?

Data is seen at: http://spreadsheets.google.com/pub?k...e9YPZElQ&gid=2

It's a standard engine, no chip. Test pull is done in -5'C, think that is why it gives 302 Hp don't know how accuret the torque readings are in a vag-com though?

3 gear pull: http://docs.google.com/View?id=dxfn59c_0dfhx9fd4
6 gear pull: http://docs.google.com/View?id=dxfn59c_4g3cvn5gk

3 gear boost level: http://docs.google.com/View?id=dxfn59c_8d35gpjff
6 gear boost level: http://docs.google.com/View?id=dxfn59c_12dnw8fbg4

Thank you in advance
Jacob

Thank you in advance.
Jacob.

NefMoto

Hve you logged misfires?

tekillator

check for leaks and TB alignment

S4istrouble

I have tried to logged misfires, but it doesn't seem to log much. The right way is under engine then meassure blocks? It is alittle rough running at idle, so I have had thoughts about misfires... How do I read misfires with vagcom?

Thanks for reply!

S4istrouble

Was hoping I could read what might be wrong in the vag-com, as it is -10'C outside and I haven't build me a leak tester yet. But if I don't find anything with vag-com, then a leak test must be done... It's just its a standard engine and the TTB and some other hoses looking very good, so a leak seems a little strange.

S4istrouble

What do you mean by alignment?

NefMoto

Measuring blocks 14, 15, and 16 show you misfires.

Here is a good reference:
http://www.ross-tech.com/vag-com/m_blocks/

Here is how you do a throttle body alignment with VAG-COM:
http://www.ross-tech.com/vag-com/cars/throttlebody.html