Question about Lexus LS 400

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My Lexus ls 400 1994 stall upon acceleration but picks up speed shortly afterwards what my possible solutio

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Run the fault codes and look for problems in the accelerator position sensor , throttle motor , MAP/VAF sensors.

Posted on Aug 14, 2015

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1 Answer

Car run but wont accelerate


For acceleration problem,the help links are provided below,click the link below to go through its procedure :----Engine accelerates when brake is applied? http://technoanswers.blogspot.in/2012/02/engine-accelerates-when-brake-is.html ----------
Loss of acceleration? http://technoanswers.blogspot.in/2012/02/loss-of-acceleration.html
----------How exactly the Vehicles Accelerator Cable works?

http://repairhelpcenter.blogspot.com/2011/11/how-exactly-vehicles-accelerator-cable.html

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How exactly Vehicles Accelerator Pump Diaphragm Works?

http://repairhelpcenter.blogspot.com/2011/11/how-exactly-vehicles-accelerator-pump.html

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accelerator pedal sensor? http://technoanswers.blogspot.in/2012/02/2009-chevy-impala-accelerator-pedal.html

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stalls and bucks on Acceleration? http://technoanswers.blogspot.in/2012/02/nissan-pathfinder-stalls-and-bucks-on.html

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Acceleration lag problem? http://repairhelpcenter.blogspot.com/2012/01/acceleration-lag-problem.html

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Car loses power while acceleration? http://schematicsdiagram.blogspot.com/2011/12/car-loses-power-while-acceleration.html

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This will help.

Thanks.

Feb 19, 2012 | 1994 Lexus LS 400

1 Answer

Engine light, no power


check out the wiring connections of the light.some thing must be getting short or cut somewhere.
thanks

Oct 29, 2008 | 1994 Lexus LS 400

1 Answer

I have a ls400 1993.My car starts fine. But when I accelerate it moves very slow them picks up speed after a few minutes. repeats at every stop... Please help.


Throttle position sensor may be faulty. They do not always show fault codes.

There is a vehicle speed sensor too that may also be at fault. but the TPS is easier to get at initially.

Jan 28, 2012 | 1993 Lexus Ls 400

1 Answer

Hesitation when accelerating


By now, your car probably has on average over 100,000 miles. I good solid tune-up with spark plugs and wires my solve your problem. However, your fuel injection system my be to blame as well. Have a qualified mechanic trouble shoot your problem.

Nov 26, 2011 | 2001 Lexus LS 430

1 Answer

1994 lexus ls 400 is not acclerating fast (driving slow) picks up speed slowly whats the problem?


There may be a problem in combustion unit. If the fuel supply to the combustion unit is not perfect, you will not get a sudden pick up. Try to fix these problems to get a better drive. If you want a higher pick up add superchargers or turbo as it induces oxygen for a better combustion. Have a glance at this link http://www.carpartswarehouse.com/part/turbo.html

Apr 12, 2011 | 1994 Lexus LS 400

1 Answer

My 1992 lexus ls 400 keeps stalling and idleis very low


Look for a small electric motor near the accelerator cable and near the top of the valve cover.

It's call IDLE AIR CONTROL (IAC) motor.

It's job is to increase the idle when load is added.
Example: turning on headlight,turning on AC.

Testing it is simple.

Warm up you car for 10 minutes.

Locate the IAC motor

turn on loads.....AC,headlights,etc


The motor should move the idle up


If the motor does not increase the RPM then it can be stick.

Try to give it few gentle taps to free up the gears.

It can be clean if your are up to it.


This electrical motor is very expensive. Please handle it with care.

====

The other trouble spot are

old accelerator cable

TPS Throttle position sensor

====

I will do a simple tune up and gas treatment before starting to replace any parts.


Please post reply on the comment window.


Oct 27, 2009 | 1992 Lexus Ls 400

3 Answers

My 1990 Lexus LS 400 stalls unexpedly (at any speed).When put in neutral, it starts up and runs fine for a few minutes then stalls again. Why?


Your fuel pump or fuel pressure regulator are not supplying constant fuel pressure. Too much or too little is causing it to kill. You can pull the vacuum line from the regulaor and check for gas. If there is none, you need a pump, it is weak.

Sep 05, 2009 | 1990 Lexus LS 400

3 Answers

1993 Lexus LS400 acceleration stalls or surges


I HAD THE SAME PROBLEM WITH MY CAR. 93 LS 400. THAT WOULD BE YOUR FUEL FILTER OR THE FUEL PUMP GOING BAD. TRY CHANGING THE FILTER FIRST. THE DEALER TRIED TO CHARGE ME $980 TO CHANGE FUEL PUMP.

Jul 06, 2009 | 1993 Lexus Ls 400

1 Answer

Stalls upon acceleration and back fires during engine speed.


check your fuel presher . mazda have a high fuel presher,

Apr 20, 2009 | Mazda B2200 Cars & Trucks

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