Having problems with your 1993 Lexus Ls 400 ?
When I press on the break the reverse light comes on and it seem to down shift. Also heavy smoke appears when starting my vehicle and cannot pass MD inspections. Do you think there is a power steering leak or the catalyst converter needs to be replaced on my 1993 LS 400?
I may have answer for the first problem. I found the cable in the trunk broken and shorted to other wires. It happened right at the driver side hinge. Because the cable were bending everytime the trunk open and close, the electrical cable broken and exposed. It messed up my 92 ls400 instrument light when I step on the brake.
The smoke is likely from the Air Control Valve that comes from the power steering pump. When it goes bad it sends power steering fluid into the intake manifold causing a whitish type of smoke similar to oil smoke. Ebay has the lowest cost I've noticed so far for the part.
Repair Help & Product Troubleshooting for 1993 Lexus Ls 400
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