rpm drops down

[bandi0564]

i have a 95 protege 1.8 automatic and every time i turn on my a/c my rpm drop down from 800 to 600 and my engine start rattle. i check my timing and is perfect. is there any compensator that when I turn the a/c will keep my rpm in 800 and not let it drop.

 

[Heminator]

i'm pretty sure there is an aic (automatic idle control) valve that should compensate for the drop in rpm when the ac comes on ....aha it's called the isc ( idle speed control).



added:it's mounted right on/ near the throttle body has a cpl wires leading to it and acts as a bypass to allow more air to the motor when idle drops due to accessories

 

[bandi0564]

i'm pretty sure there is an aic (automatic idle control) valve that should compensate for the drop in rpm when the ac comes on ....aha it's called the isc ( idle speed control).



added:it's mounted right on/ near the throttle body has a cpl wires leading to it and acts as a bypass to allow more air to the motor when idle drops due to accessories

 

[bandi0564]

thank you for your support. how can i troubleshoot this idle speed control.

 

[Heminator]

actually i'm new to mazdas in general and am hoping that someone more experienced will jump in, i'd scan you what it says in the manual i have but they seem to have omitted that section