diagnosed as idle air control issue; however, that part usually causes stalling not revving up.
Mar 4, 2023 at 8:03 AM
engine speeds up randomly at any speed over 40 MPH?
1992 CADILLAC DEVILLE
MABLE ORNDORFF
- MEMBER
- 1 POST
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Hi,
The IAC can cause both. Oftentimes, the idle speed will vary up and down. Chances are the person that to you is correct.
As far as the IAC is concerned, take a look through this link. It explains how it works.
https://www.2carpros.com/articles/how-a-idle-air-control-valve-works
Also, here is a link that explains in general how one is replaced:
https://www.2carpros.com/articles/how-to-replace-an-idle-speed-control-motor-iac
The IAC is located on the top LH Side Of the engine, in front of the Air Intake Assembly. See pic below
I hope this helps you. Let me know if you have other questions.
Take care,
Joe
See pic below.
The IAC can cause both. Oftentimes, the idle speed will vary up and down. Chances are the person that to you is correct.
As far as the IAC is concerned, take a look through this link. It explains how it works.
https://www.2carpros.com/articles/how-a-idle-air-control-valve-works
Also, here is a link that explains in general how one is replaced:
https://www.2carpros.com/articles/how-to-replace-an-idle-speed-control-motor-iac
The IAC is located on the top LH Side Of the engine, in front of the Air Intake Assembly. See pic below
I hope this helps you. Let me know if you have other questions.
Take care,
Joe
See pic below.
Image (Click to enlarge)
Professional Diagram for 2CarPros Members
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Click here to log in and view diagram.
Mar 5, 2023 at 2:02 PM
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