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)
SOURCE: 91 LEXUS LS 400 UNABLE TO LOCATE AMP
its in the trunk on my car next to the power ant mount left side.
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...
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.
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.
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The other trouble spot are
old accelerator cable
TPS Throttle position sensor
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I will do a simple tune up and gas treatment before starting to replace any parts.
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