Sport Mode

Post by **jbo6924** » 24 Aug 2011, 18:46

My 98 t5 has the three mode auto trans...E for economy, W for winter, S for Sport.
While driving in sportmode, I punched the pedal got a slightly delayed reaction, and at high speed got a "fluttering" sound and noticed some black smoke from the exhaust. Any ideas?

D_V_ENT850R · Post by **D_V_ENT850R** » 24 Aug 2011, 21:02

Did the fluttering sound happen when you released the throttle? From a stop or already moving did you feel a "delay?"

Post by **jbo6924** » 26 Aug 2011, 18:11

The flutter happened under excelleration. Car was in motion on the highway at the time. Any ideas?

Post by **Red-Arrow** » 26 Aug 2011, 19:23

Look at the Blow off valve or dump valve as its known. It sounds like its not holding boost and leaking. This could give bad economy as well.

Post by **jblackburn** » 29 Aug 2011, 07:12

Sounds like a bad compressor bypass valve on the turbocharger. IPD sells an excellent replacement.