2G Possible vacuum leak

[MasterMatt209]

I have a 98 GSX, I went to get my CEL checked and it came up as P0505. Probable cause, 1. Vacuum leak 2. Dirty throttle body 3. IAC motor defective 4. Poor electrical connection to IAC

What do you guys think I should do? How do I perform a vacuum leak test?

 

[snowborder714]

Boost leak test.
http://www.dsmtuners.com/threads/boost-leak-test-how-to-with-boostpro-net-tester.169435/

Test ISC.
http://www.dsmtuners.com/threads/dsm-isc-motor-testing-replacement.386663/

 

[MasterMatt209]

The engine light want away today

 

[DSTSI]

P0505 (idle Air Control) may have went away due to some IAC adjust themselves at driving speeds by fully extending and retracting to get a baseline setpoint and if the iac does not respond within a time frame the ecm will put out a clc for this, not saying this is your issue for the clc turning on and off but I have seen this before due to carbon build up on the thiny