WimpyS4
11-25-2024, 05:59 PM
2012 S4 w 175k MI | Tuned IE STG 2DP 91
Just replaced the PCV, the valve cover gasket, breather hoses (one side had snapped), and the coolant return that runs over the PCV while trying to fix P0507 (Idle Control system RPM - Higher than expected) & P0068 (MAP/MAF - Throttle position correlation). While the supercharger was off, I cleaned the buildup out of the TB. Started it after replacing and immediately got a 2k RPM cold start which dropped to the normal idle RPM. Got it up to temp then stopped it, ran TB adaptation via IE Powerlink, started again and it ran at 2k RPM again before falling pretty hard to normal idle then it started idling pretty low & rough and threw up Christmas lights.
Video: https://youtube.com/shorts/yI8Sd2wLYxE
I'm pretty sure this behavior started before I replaced everything. All this work started when I drove it 100ft and stopped, ran TB adaptation (trying to get rid of P0068), then started and it went into full limp mode. I got P0507 on the first start > cleared codes > started then it threw P2101 (Throttle Actuator 'A' Control Motor Circuit Range/Performance).
Question is, is this due to a bad TB, a bad sensor, or do I need to replace my throttle pedal? Is there anything else I can do to diagnose?
Just trying to get this thing back on the road after a few months of waiting for parts. Any insight is appreciated!
Just replaced the PCV, the valve cover gasket, breather hoses (one side had snapped), and the coolant return that runs over the PCV while trying to fix P0507 (Idle Control system RPM - Higher than expected) & P0068 (MAP/MAF - Throttle position correlation). While the supercharger was off, I cleaned the buildup out of the TB. Started it after replacing and immediately got a 2k RPM cold start which dropped to the normal idle RPM. Got it up to temp then stopped it, ran TB adaptation via IE Powerlink, started again and it ran at 2k RPM again before falling pretty hard to normal idle then it started idling pretty low & rough and threw up Christmas lights.
Video: https://youtube.com/shorts/yI8Sd2wLYxE
I'm pretty sure this behavior started before I replaced everything. All this work started when I drove it 100ft and stopped, ran TB adaptation (trying to get rid of P0068), then started and it went into full limp mode. I got P0507 on the first start > cleared codes > started then it threw P2101 (Throttle Actuator 'A' Control Motor Circuit Range/Performance).
Question is, is this due to a bad TB, a bad sensor, or do I need to replace my throttle pedal? Is there anything else I can do to diagnose?
Just trying to get this thing back on the road after a few months of waiting for parts. Any insight is appreciated!