Question about 1991 Lexus LS 400

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1993 lexus ls 400 is experiencing a power loss when i take off from a dead stop and it also cuts off at times when i come to a stop or it will skip real bad at a stop as if it wants to cut off this only happens when the check engine light comes on when it is off the car runs perfectly fine. o u think the engine control computer is the problem

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  • 4 Answers

Probably worth checking code to get better ideas for diag

Posted on Oct 21, 2017

  • Jeff Garrett
    Jeff Garrett Oct 21, 2017

    probably worth checking code to get better ideas for diag

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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j_del
  • 1586 Answers

SOURCE: loud noise when turning wheel

That red fluid is power steering fluid. You may not have lost enough yet to register but you will. You need to determine whether it's leaking from a cracked hose (which I've seen on Toyota products), or from the steering rack itself, and from there the course of repair can be determined.

Posted on Sep 22, 2008

  • 51 Answers

SOURCE: 1997 Lexus LS 400 Fuel Filter location

The fuel filter is located under the vehicle on the left side before the rear axle.

Posted on Oct 13, 2008

  • 1 Answer

SOURCE: 1994 lexus ls 400 problem with dash board light

Try rotating the ignition switch slightly after you turn it to on and see if the lights come on...had the same problem and changed the switch fixed the problem...

Posted on Feb 14, 2009

mkv0525
  • 358 Answers

SOURCE: 92 lexus ls 400 check engine and traction control light came on at the same time, 92 lexus ls 400.

the track off light will come everytime yhe check engine light comes on. this is normal. you need to have the check engine light checked first.you can go to your local parts house they will scan it for so you at least see what area you problem is in and then you can start from there. let me know lf you find out youe engine codes.

Posted on May 27, 2009

mecanica03
  • 918 Answers

SOURCE: 1993 lexus LS 400 speedometer works sometimes

the plastic gear on speed sensor is broken , replace , this is on transm. rear case

Posted on Jun 18, 2009

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2 Answers

I need diagram of fan belt for Lexus LS 400 1993 model.


go on youtube you will find your answer there

Feb 18, 2015 | 1993 Lexus Ls 400

2 Answers

1993 Lexus Ls400 loss of power a 2500-3000rpm when you accelerate hard on the gas pedel, hower if you press down on the gas pedal slowly the power will increase all the way up to 6000rps with no power...


Sounds like your fuel filter is getting clogged up. Get that changed and it will be fixed. Should be an easy, cheap fix. Hope this helps, James Booth :))

May 17, 2011 | 1993 Lexus Ls 400

1 Answer

1993 Lexus Ls400 loss of power a 2500-3000rpm when you accelerate hard on the gas pedel, hower if you press down on the gas pedal slowly the power will increase all the way up to 6000rps with no power...


Wish I had an answer - sounds very much like a problem I am having with my '92 LS400. I have a parts car, and have changed out the ECM, fuel pump, injectors, fuel pilter, fuel pressure regulator, ran the can with exhaust unbolted (check for clogged CATs, checked out my timing belt for slippage amoung other things, and nothing works. I have no check engine light on. Do you?


Jun 30, 2010 | 1991 Lexus LS 400

2 Answers

1993 Lexus Ls400 loss of power at 2500-3000rpm


Check your MAF and MAP sensor. The first 80% of your throttle signal from the TPS works with the O2 sensor to try to keep the air fuel ratio to 14.7 to 1 with the ECM controlling the fuel injector spray time and timing the ignition. After the 80% to WOT the ECM puts the O2 sensor in to an open loop and takes the Reading form the MAF and MAP sensor to run the engine richer so there will not be any Detonation to the engine and burning holes in the valves for running too lean. That is why it always feel like you get a little more when you ease off on the gas peddle from WOT. Recap check the TPS, MAF,and MAP sensor and wires to those sensors, if you can get the car scanned that would be great and you may find out which sensor may have gone bad, the other thing to is the fuel pressure regulator may be going bad and at WOT the pressure may be to high causing it to run to rich causing the loss of power. Good luck and hope this helps. 

Jul 04, 2009 | 1991 Lexus LS 400

1 Answer

1993 Lexus Ls400 loss of power a 2500-3000rpm when you accelerate hard on the gas pedel, however if you press down on the gas pedal slowly the power will increase all the way up to 6000rps with no power...


It sounds like a fuel delivery issue so it could be many things such as low fuel pressure from the pump,clogged or partially pluged fuel filter, a malfunctioning throttle posisitioning sensor (if you have a check engine light on) or if its turbo it could be turbo lag etc.

Jul 04, 2009 | 1991 Lexus LS 400

1 Answer

1993 lexus LS 400 speedometer works sometimes


the plastic gear on speed sensor is broken , replace , this is on transm. rear case

May 31, 2009 | 1991 Lexus LS 400

1 Answer

What cause a cam sensor to blow in a 1993 lexus sc 4000?


i have a 90 ls 400 my radio stopped working you can have it reaired or hust get a aftermarket one installed as for the mirror check your fuses

Mar 10, 2009 | 1993 Lexus Ls 400

1 Answer

Steering control


check tire rod ins

Feb 20, 2009 | 1993 Lexus Ls 400

1 Answer

Runs for awhile and then losses power!!


Man! Lexus is ****! I have the same problem.

Aug 14, 2008 | 1992 Lexus Ls 400

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