What was your reason for raising your idle...and why did you have to do it twice?

Also, is "Star Diagnostics" a type of OBDII reader...and is it only Dealers that have this equipment?

Thanks to all for your comments.

Also...the thread about rough engine idle..when stopped at lights...this is my major reason for asking this question...since when the air or heater are on with the lights on and it loads down the engine, my rpm's drop down into that low 450rpm range...and I get that rough engine idle for 3-5 seconds.

Therefore, I wanted to raise the idle so the engine will not go below 550 rpm.

Any additional comments or thoughts are appreciated.

Regards,

Ben