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What causes the car to stall at a low idle when the engine is hot and the air conditioner is on in a 1993 ls 400 lexus?

1 Answer

Colin Stickland

Lexus Master 22,516 Answers
Posted on Feb 02, 2012

Colin Stickland

Lexus Master

Joined: Nov 04, 2008

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Idle control motor its on the inlet manifold and either needs renewing or a good clean

1 Related Answer

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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What causes the car to stall at a low idle when the engine is hot and the air conditioner is on in a 1993 ls 400 lexus?

1 Answer

Colin Stickland

1 Related Answer

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Why do my 1993 lexus ls 400 shut off after driving 4 to 6 miles and restart after sitting for a few minutes but shut off again?

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Trustworthy Expert Solutions

What causes the car to stall at a low idle when the engine is hot and the air conditioner is on in a 1993 ls 400 lexus?

1 Answer

Colin Stickland

1 Related Answer

Vincent G

Add Your Answer

Attachments: Added items

Related Questions:

Why do my 1993 lexus ls 400 shut off after driving 4 to 6 miles and restart after sitting for a few minutes but shut off again?

CAR IDLE BAD WHILE DRIVING WHEN STOP STALLS OUT WONT START BACK THE NEXT MORNING CAR STARTS UP JUST FINE

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