1993 Lexus LS 400



December, 27, 2008 AT 4:15 PM

Steering problem
1993 Lexus LS 400 V8 Two Wheel Drive Automatic 150000 miles

My car smokes when I start it. The only fluid levels I can find are the power steering unit which requires constant refilling. Is there a connection between the power steering and the exhaust smoking? The power steering unit specifies auto transmission fluid.


3 Answers



December, 27, 2008 AT 5:46 PM

Hello -

Is your car running rough at all?

What color is the smoke and is it all the time or just at start up?

Have you inspected the PS pump lines all around the rack and pinion area for any leaks?



December, 27, 2008 AT 8:15 PM

Very little smoke after brief run time. A lot when when engine first started. Smoke is very light colored, not dark like oil smoke. Cannot find any leaks. Tklhe power steering unit uses ATF fluid instead of power steering fluid. Cannot understand, losing more fluid and the smoking gets worse. Go figurs.



December, 28, 2008 AT 12:25 AM

Hello -

Well, normally from my experience the PS is not connected to the engine.........but I need you to look at the below pic......I have circled and put an arrow at a couple of items. They say they are vacuum lines.


I have looked through numerous schematics and can not find any vacuum lines going to the PS other than.....these if they are.

Please pop the hood and put eyes on the target here and let me know what you see.....

There should be two lines that go to the rack..........

These look like two others.....see what they are connected to and where do they go.....if it is what I think, these lines end up going to the intake manifold. I would disconnect them and see if you have PS fluid in them....

Let me know what you find there........

I have also put how to bleed the system...............



CHECK FLUID LEVEL IN RESERVOIR TANK Check the fluid level and add fluid if necessary. Fluid: ATF DEXRON ©II HINT: Check that the fluid level is within the HOT LEVEL on the dipstick. If the fluid is cold, check that it is within the COLD LEVEL on the dipstick.


START ENGINE AND TURN STEERING WHEEL FROM LOCK TO LOCK THREE OR FOUR TIMES With the engine speed below 1,000 rpm, turn the steering wheel to left or right full lock and keep it there for 2 - 3 seconds, then turn the wheel to the reverse full lock and keep it there for 2 - 3 seconds.


CHECK THAT FLUID IN RESERVOIR IS NOT FOAMY OR CLOUDY AND DOES NOT RISE OVER MAXIMUM WHEN ENGINE IS STOPPED Measure the fluid level with the engine running. Stop the engine and measure the fluid level. Maximum rise: 5 mm (0.20 in.) If a problem is found, repeat steps 2 and 3. Repair the PS if the problem persists.

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