Only 0,6 bar in my S2 3b

[terremoto]

My S2 only blow at max 0,6 bar, I have changed the N75 and the DV, I checked for no leaks in the boost circuit. At idle the manometer shows -0,6 -0,7bar, at full throtle +0,6bar. What is happening? Can be the wastegate (soft spring)? Can be the manometer? What else? Thank you very much.

[Knight Rider S4]

HAve you run vag.com to see if it has shown any codes?.....Other things to check would be MAF ..give it a good clean and check the connecting plug to ensure it is on properly ...MFTS switch, if this faulty is could cause lower boost

[S2central.net]

Is the throttle opening fully at WOT ?

Check resistance of throttle pot...

[terremoto]

The diagnostic machine don't show any code except the rev. sensor, what is MFTS? What is WOT? Where I have to read the resistance? Thank you

[S2central.net]

If you search for these terms you will find them... I think most of them are in the FAQ here.

[terremoto]

Thank you

[terremoto]

TPS is correct (WOT) resistance 1k-2,5k , Maf is clean, but how can I check the mfts?

[20Vcqdriver]

TPS is correct (WOT) resistance 1k-2,5k , Maf is clean, but how can I check the mfts?

Try Paul's info here;

http://www.s2central.net/ds_G70.html

[UrS4boy]

My S2 only blow at max 0,6 bar, I have changed the N75 and the DV, I checked for no leaks in the boost circuit. At idle the manometer shows -0,6 -0,7bar, at full throtle +0,6bar. What is happening? Can be the wastegate (soft spring)? Can be the manometer? What else? Thank you very much.

My guess = Boost signal hose to ECU is off or broken somewhere and the G71 Manifold Absolute Pressure (MAP) sender is not getting any signal so the ECU is not increasing the boost. All you are getting is mechanical waste gate spring pressure.

Visit these two posts:

http://forums.audiworld.com/showthread.php?p=18863287 and

http://forums.audiworld.com/showthread.php?p=18953620

Should help.