When I turn on the AC the engine rpm's drops. At idle the drop can be as much as 400 rpm's. Any idea whats happening?
Nov 1, 2017 at 6:51 AM
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WRENCHTECH
✓Experienced Mechanic
20,760 POSTS
It is very normal for the AC to add additional load on the engine, but the IAC normally compensates for it. You should try first cleaning the inside of the throttle body and backside of the throttle plate, then remove the IAC and clean and lube the slide valve inside. That should stabilize the idle.
Nov 1, 2017 at 8:52 AM
FAKLUN1
MEMBER
2 POSTS
What is IAC?
Nov 1, 2017 at 9:05 AM
WRENCHTECH
✓Experienced Mechanic
20,760 POSTS
Idle Air Control
This picture may be from a different model, but it is basically the same.
Image (Click to enlarge)
Nov 1, 2017 at 9:10 AM
FAKLUN1
MEMBER
2 POSTS
Where on the engine do you normally find it?
Nov 1, 2017 at 9:16 AM
WRENCHTECH
✓Experienced Mechanic
20,760 POSTS
It will be in the manifold, near the throttle plate.