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carl singley Posted on Apr 14, 2017

Lexus ls 400 4 door v8 will start but not stay running.

5 Related Answers

A

Anonymous

  • Posted on Aug 27, 2008

SOURCE: Lexus won't stay running

Having same issue here. Try to change mass air flow sensor (bad news for you, it costs about $400)

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Anonymous

  • 1 Answer
  • Posted on Sep 10, 2008

SOURCE: 91 LEXUS LS 400 UNABLE TO LOCATE AMP

its in the trunk on my car next to the power ant mount left side.

Anonymous

  • 1 Answer
  • Posted on Feb 14, 2009

SOURCE: 1994 lexus ls 400 problem with dash board light

Try rotating the ignition switch slightly after you turn it to on and see if the lights come on...had the same problem and changed the switch fixed the problem...

mkv0525

Mike Vincent

  • 358 Answers
  • Posted on May 27, 2009

SOURCE: 92 lexus ls 400 check engine and traction control light came on at the same time, 92 lexus ls 400.

the track off light will come everytime yhe check engine light comes on. this is normal. you need to have the check engine light checked first.you can go to your local parts house they will scan it for so you at least see what area you problem is in and then you can start from there. let me know lf you find out youe engine codes.

Mustgo

Vincent G

  • 2363 Answers
  • Posted on Oct 27, 2009

SOURCE: my 1992 lexus ls 400 keeps stalling and idleis very low

Look for a small electric motor near the accelerator cable and near the top of the valve cover.

It's call IDLE AIR CONTROL (IAC) motor.

It's job is to increase the idle when load is added.
Example: turning on headlight,turning on AC.

Testing it is simple.

Warm up you car for 10 minutes.

Locate the IAC motor

turn on loads.....AC,headlights,etc


The motor should move the idle up


If the motor does not increase the RPM then it can be stick.

Try to give it few gentle taps to free up the gears.

It can be clean if your are up to it.


This electrical motor is very expensive. Please handle it with care.

====

The other trouble spot are

old accelerator cable

TPS Throttle position sensor

====

I will do a simple tune up and gas treatment before starting to replace any parts.


Please post reply on the comment window.


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