My2007 lexus 400h has a high pitch whine when accelerating at high speeds and goes away when I take my foot off the gas

SOURCE: 1999 Lexus - ES 300 - STalling Problem

First of all, change the Lexus Dealership who is doing your rigid maintenance because they are ripping you off and not doing the work or careless on the way out of your engine compartment.
At 95k, you should have changed out your timing belt, replace all the sparkplugs, cleaned out the throttle body, cleaned the MAF sensors, replace the O2 sensors, inspected and replace the fuel rails, and the spark distribution units and you should not be getting a simple problem as this.
All this said, open you hood and look for a vacuum hose that is disconnected.  Most of the hoses which will cause this type of problem is located around the air filter box or connected to that side of the engine.

Posted on Mar 16, 2009

SOURCE: I have a 2004 Lexus 330 ES and it makes a hight

Alternator, pulleys, aircon compressor, transmission: check in that order.

Posted on Jan 26, 2010

SOURCE: I have a high pitched

hi there is it from under the bonnet if so remove the alternator belt prob just a tensinore. or a wheel bearing on its way out. hope this helps you

Posted on Jan 26, 2010

SOURCE: lexus gs300 vsc check engine light gas pedal no acceleration

I have a a 99 gs 300, check engine light is on as well as the vsc light. What is that and needs to be to done to fix it.

Posted on Nov 02, 2010

SOURCE: my lexus gs300 1998 cannot get proper acceleration

70% is the ECM PROBLEM FOR THE GS300 2JZGE ENGINE VVTI

Posted on Jul 22, 2011