P0302 is Misfire Detection - Cylinder 2, while P0507 is Idle Control System - RPM Higher than Expected. You probably have carbon buildup on the throttle body and on the injectors.
Trouble code P0507 means:Idle control system RPM higher than expected
P0507 : Idle control system, RPM too high.
Trouble code P0507 means:Idle control system RPM higher than expected
Trouble code P0507 means: Idle control system, rpm higher than expected
Trouble code P0507 means:Idle control system RPM higher than expected
Trouble code P0507 means:Idle control system RPM higher than expected
Trouble code P0507 means:Idle control system,RPM higher than expected
Trouble code P0507 means:Idle control system RPM higher than expected
Code p0507 2001 chevy s10 replace upper intake, iac, tps still have problem
Trouble code P0507 means:Idle control system RPM higher than expected
Trouble code P0507 means: Idle Air Control System RPM Higher Than Expected Replace the Idle Air Sensor
Idle control system, RPM higher than expected.