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LS400

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Question
I have replaced radiator watepump ect still running hot
If you did not replace the thermostat then you should replace it and then refill the system after bleeding out all the air in the system. Check to make sure the fans come on when the temperature goes up. If...
Question
Will bad brake calipers cause excessive vibrating in steering wheel while driving?
This may very well be caused by the uneven wear on the front tires. When uneven tread is subjected to various road conditions or braking power, this will definitely cause a vibrating or shaking feeling. This may also be caused...
Question
Speed sensor may be bad
You are likely correct. The speed sensor is the most common problem with this type of issue and this would need to be checked and scanned to review any faults. I recommend having a certified mechanic, such as one from...
Question
Keyless remote broken
The system will need to be checked to see if the drivers door lock is having an issue or the remote is the cause. The remote may have a bad button for the drivers door since it is the one...
Question
Overheat but gauge is not on H
You did not mention the thermostat being replaced. If you did not replace it, then it may be sticking or not opening. The next thing to check is to see if the fans are coming on before the temperature gets...
Question
ENGINE OVER HEATING
It sounds like you may have a defective thermostat if you haven't checked it yet. If it still overheats after fixing the thermostat then check the radiator next. Make sure the radiator flows in all of the fluid properly. Lastly,...
Question
Car is overheating quick
Hello. If the gauge goes hot instantly when first started in the morning, then you may have a faulty gauge or coolant temperature sensor. For this car in particular the sensor is usually problem. If the temperature shows cold at...
Question
I belive its my alternator put 3brand new batteries in the car and still want start
Hey thanks for writing in about your 1990 Lexus LS400. A no crank condition such as this will not be the alternator. You either have a bad starter or a bad connection. The most effective tool to diagnose this condition...
Question
Car not moving when pressing the gas pedal
The first thing to check would be the shifter cable and adjustment, and check the computer for transmission codes, especially range sensor codes. If the computer does not know the car is in “drive”, it will not activate the proper...
Question
The engine ticking on a '95 Lexus LS 400
The first thing you'd want to do is get someone to check the valve lash--it may need the valves adjusted. Those things have pretty bullet-proof engines but they do have the valve adjustments on them that are little, stainless steel...
Question
Need to no how to bypass lamp failure sensor for tail & brake lights to work
Hello. Bypassing the lamp failure sensor involves locating the correct signal and ground wires and splicing them together to bypass the circuit. The actual cutting and splicing process is rather simple, however, you must make sure that the correct wires...
Question
What would be a price estimate of replacing a timing belt but not the the component kit?
The timing belt on your vehicle is recommended to be changed every 60,000-90,000 miles. If a timing belt fails, the engine will stop running, and you may damage the engine. To get an idea of the cost involved to replace...
Question
When completely stopping, jolt from ABS locking
If you are having the ABS engage when you are slowing, then the speed sensor for one of the wheels is not reading correctly and is in need of replacing; the bearing that got replaced is going to be the...
Question
Car keeps dying
There are usually two different issues that cause the engine to stall or reduce RPM in situations like this. The first thing I'd look at is the idle control valve or sensors that monitor the fuel system. The second item...
Question
How to reset worn brake indicator
You will have to replace the brake pad sensors when you replace the worn out brake pads. The light will then will go out on its own. If the light does not go out, then you have a short in...
Question
Trouble starting car after sitting for 2 hours
You may be having a problem with one of the battery cables or connections. A mechanic can do what is called is a voltage drop test on the starter and all the cables to see if one or more cables...
Question
Accelerating doesn't produce increase in RPM
The throttle opening is controlled by the engine computer and if the computer sees a problem in the system it will limit the throttle opening. You need to have the computer tested to see the codes that can cause this....
Question
Noise in power steering and wheel difficult to handle
The power steering is not giving enough pressure from a leak or a defective pump or rack and pinion, depending on if whether it is leaking. If the pump works better when warm, then you may need to have the...
Question
Replaced the radiator but now my can is running hot. Never had this problem until the radiator was replaced
There area number of things that can make your car run hot such as low coolant levels, a faulty thermostat, or a failing coolant fan switch. As you may know, the coolant fan switch helps to maintain the proper coolant...
Question
Electrical problems
Hello. The voltage regulator is the component that adjusts and maintains the electrical system's output, making sure that there is enough power generated to meet the system's requirements. When it fails or has an issue it can cause symptoms similar...

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