The car stalled after driving 10 miles. It would only rev to 2K RPM and idled at 1K RPM cycling 100 RPM every 2 seconds. The 2.4 T has 204K miles, is well cared for and runs fine otherwise. OBD codes read P2111 most recently, and P2135 and P0221 a week ago. A code search by a friend found that 57 out of 62 occurrences of these codes were fixed by cleaning the throttle body. I wasn't able to separate the bottom of the throttle body from the intercooler-to-throttle-body pipe, but I unbolted the throttle body and cleaned the top, and sprayed carb/choke cleaner through the gap in the butterfly. I drilled a small hole in the bottom of the trap in the intercooler-to-throttle-body pipe to confirm that oil was not pooling in the trap (and then plugged it with a self tapping screw). The cleaning didn't help at first, and I ordered a new throttle body (Bosch BOS 0280750131). As a last resort before replacing the throttle body I sprayed WD40 into the connector on the old throttle body, in the hope it would find it's way into the jammed actuator. The car failed one more time, but then corrected itself and has been running fine since. I've looked at the new throttle body and can't believe the WD40 could find it's way into the internal workings of the old throttle body.
I have three questions. (1) What are the chances that the old throttle body will continue to work for the foreseeable future? (2) How do I get the old throttle body out of the intercooler-to-throttle-body pipe without destroying the pipe? (3) Assuming I can install the new throttle body, will the engine management system reset itself eventually, or at least run well enough so I can get the car to a service center to have the system reset? Thanks John R