20 Most Recent 1990 Lexus LS 400 - Page 5 Questions & Answers


It does sound like the sensor is either dirty inside the tank or bad. You will have to remove the overflow tank and the sensor is torward the bottom of the tank and easily replaced.

1990 Lexus LS... | Answered on Mar 27, 2012


air needs to be bled out of system or check wear on brakes, might not be adjusted right also .

1990 Lexus LS... | Answered on Mar 13, 2012


The first thing to have checked is the fuel pressure, low pressure kills the power.

1990 Lexus LS... | Answered on Feb 06, 2012


The starter is located at the bottom rear of the engine at the engine to transmission bolt up. You must raise the car up and get under unit to see the starter.

1990 Lexus LS... | Answered on Feb 06, 2012


Oil change won't hurt...watch out going over your scheduled oil changes. It's a 90 LS 400, It's been around.

1990 Lexus LS... | Answered on Jan 19, 2012


Read the last post:
http://us.lexusownersclub.com/forums/index.php?showtopic=66180

1990 Lexus LS... | Answered on Jan 03, 2012


I believe what this symbol is the radiator. It comes on when the coolant level is low. Take a look at your radiator coolant level and if low add some to the full mark. Do this when the engine is cold to avoid getting burned from hot water and steam.

1990 Lexus LS... | Answered on Dec 24, 2011


I had that problem on my car . it`s was my right side coil pack wire.

1990 Lexus LS... | Answered on Nov 07, 2011


it will have a dead miss or will not run

1990 Lexus LS... | Answered on Sep 25, 2011


Hi. Not exactly sure what your looking for ..... The fuel is delivered to the engine via a fuel rail and each cylinder has a injector to deliver fuel to that cylinder.

Fuel is pumped into the fuel rail at 35 psi from a pump in the fuel tank.....don't worry, never heard of one causing a fire. There's not enough air in the gas tank to support a flame.

There is also a 'throttle body' to allow air to enter the engine but iit is not like an old carburettor also delivered fuel.

If you look in the engine bay you will see the cables that operate the throttle body. there will be two cables, one for the throttle controlled by the drivers pedal and one cable operated by the cruise control.

Hope this is some help.

1990 Lexus LS... | Answered on Sep 18, 2011


go to the auto parts store they can most likely tell you what it is and maybe change it for you tip them well

1990 Lexus LS... | Answered on Sep 08, 2011


Find a better mechanic. How can a battery POSSIBLY overcharge with the alternator disconnected? plus you NEVER should disconnect battery or alternator while engine is running. A voltage surge could wipe out the ecm.

1990 Lexus LS... | Answered on Aug 02, 2011

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