NickT
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Hi, I have a 95 LS400 and on country runs ( 100km or more) when i slow down to pull into a service station or stopping at traffic lights my car stalls. Its not consistent but can happen half a dozen times or more on one trip. Other Lexus sites have this thread and claim its a problem that affects the 95 and 96 LS 400 and is to do with a problem with the cars ECU.It seems to only happen on country driving ( never in city use) and only when the aircon is not on. Some of these sites claim that Lexus knows of the problem and it is related to a software problem within the ECU which controls the idle control valve. These sites claim that changing the valve will not solve the problem , you have to replace the ECU with the upgraded software .
Is anyone else having this problem?
NickT
95 Ls400 Stalls On Country Drives
in Lexus LS400 / Lexus LS430 / LS460 / LS600 / Toyota Celsior Club
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Hi Greg, I have had two idles valves replaced. The first one I had to pay for ( $900 ) and the problem remained . Lexus insisted it is a idle valve problem and not the ECU and replaced the idle valve at no cost to me. Guess what the problem remains . In the US lexus site , it is believed to be the fault of the ECU on the 95 and 96 LS 400 , but Lexus do not seem to want to know about it. Its all getting too hard and a replacement ECU is over $ 2000.The solution to the problem is easy though. if you have the air conditioning on the problem goes away.