Question about Cadillac DeVille
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Posted on Jan 02, 2017
SOURCE: my car
Is the check engine light on?? If not, I would try base idle adjustment. For that you will have to go to a dealer, because you need a scanner for this operation. Base idle adjustment is done by turning a screw built into the IAC valve, which keeps the car running by giving it air. If your base idle is too low, then the engine is not getting enough air resulting in stalling. Let me know what you find.
Posted on Sep 07, 2008
sound very much like a vacuum leak.... also maybe your timing is off? possibly advanced? try retarding it with the distributor if thats the case...
Posted on Feb 01, 2009
The Idle Air Control (IAC) valve is clogged. This part feeds air to the engine at start-up and idle when the throttle bodies are closed. I removed the throttle body assembly from my 2001 RX300 and separated it from the IAC. After a good cleaning with throttle body cleaner the IAC was good as new. I later decided to replace it during routine maintenance. You can pick up a brand new IAC on eBay (genuine Lexus/Toyota part). The dealer will want upwards of $400.00 for a 45 minute job (all you need are basis hand tools).
Posted on Mar 23, 2009
Check and clean Idle air control valve. Make sure its responding to signal as well. Also make sure ther are no vacuum hoses disconnected. This may not be a "cure" but it's a good place to start.
Posted on Apr 14, 2009
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