[s-cars] Boosting nicely, now a 2111 code

[Jim Fleischer]

Hey guys,

So nice to have a free-breathing car again!  Now on to the next project.....

I am experiencing some overboost/cut out at all rpm's and it's not necessarily all that consistent.  And it's a complete temporary shutdown, like the ECU is shutting the fuel pump off for a second, not a gradual stumble.  The check engine light will come on every so often while this is happening, then go off after about 2-3 seconds.  Not every time though.  I blinked the codes and got a "2111" which is the RPM/Engine Speed Sensor.  According to the SJM website, I understand that this code can be misguided if the car is not running when blinking codes, but the car was running.  With 140K miles, is it okay to assume that this is my issue?  I have already gone through everything else while trying to track down my lack of boost issues, such as boost leaks, vacuum leaks, fuel pump, wastegate, etc.  My understanding is that if it's a coil or plugs, it will just stumble a bit on the way through the rev range, not a temporary shutdown like I am experiencing.

The sensor is about $100 from Sunset Audi......at 140K miles, seems like it could be the culprit.  Thoughts?

Many thanks to all again.....gotta love the list!

Best regards,

Jim Fleischer
'95 urS6 avant, breathing heavy, coughing every so often