Question about 1997 Lexus LS 400
Also during this the car shakes and vibrates
It sounds like maybe your I.A.C. (Idle Air Controll) valve is stuck or gummed up. Try cleaning it and check for vaccume leaks.
Posted on Feb 17, 2014
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Posted on Jan 02, 2017
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
I had the exact same problem or almost 2 years. I kept buying a battery, because I thought that was the problem. I eventually took it to a mechanic and off course the car didn't act up when the mechanic had it for several days. Finally, I checked all of the fuses. It was the cigarette lighter fuse that was blowen. Since I changed that fuse, the car starts up with no problem. It's frustrating everytime you get in the car you cringe when you start it - LOL Hope this helps.
Posted on Jul 08, 2009
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