Question about 1991 Lexus LS 400
Posted by Anonymous on
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Posted on Jan 02, 2017
each corner will have drains, sometimes you can get a long air gun and shoot some air down there and clear the stoppage, but be careful that you dont blow the hose off. sometimes it just may need to be lubricated.
Posted on Oct 11, 2009
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.
Posted on Oct 27, 2009
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