Question about 1991 Lexus LS 400

1 Answer

I have a 1991 Lexus LS400, I will be driving it and it will up and die on me as though it is not getting any fuel, I've taken it to the shop and they are unable to find anything wrong, they said fuel pump is good, had fuel filter changed at the time I had a tune up,

Posted by on

  • roxannepwats Apr 01, 2011

    it starts back up after it cools down will run great for awhile and die again

×

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Lexus Master
  • 1,940 Answers

Have the timing checked out. If it is off a couple of teeth, the engine should run, but will die when warmed up. Your 8 Cylinder uses a timing belt with a hydraulic belt tensioner. If the tensioner is leaking, or worn from old age, the belt may jump a couple of teeth. I believe your engine is an interference engine. If the belt has slipped, it is possible you may have bent valves, or worse.

Just wondering, when the engine dies on you while driving, does it start right back up, or does it start up only after cooling down?

Posted on Mar 31, 2011

  • Jeremy Moore
    Jeremy Moore Apr 01, 2011

    I have had this same problem on many vehicles, including my own, and many times if the timing is fine, it turns out to be the Camshaft and/or Crankshaft Position Sensors failing from the heat. This cause the ignition to be cut. After the car cools down, it starts right back up. I have also had the same symptoms with a failing ECM. This is usually not the case though. You will need to monitor the Camshaft and Crankshaft Position Sensor outputs while the engine is running, and watch for the one that loses the output, or the output changes dramatically. If you have no way of monitoring the sensors during Engine operation, I would go ahead and replace them if you haven't done so in the past. This car is 20 years old, and these sensors don't normally last that long.

  • roxannepwats Apr 08, 2011

    Thanks for the info I will have those sensors checked, however I did find a blown fuse in the engine compartment which was to the fuel injection system so I replaced that and so far I have had no problems with it since, but will have the sensors checked Thanks

×

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

I have a LS400 Lexus thats will start then immediately dies, I've checked fuel pressure and have 40psi, it is not pulling any codes, has new battery, any suggestions?


Hello,

Does the vehicle rev up to about 2k RPM and then die? Does it do this every time, meaning can you start the vehicle every time but then dies?
Was there any other things happening before or several different things? Example - black smoke out tail pipe, would not hold a steady speed and jerked or hesitated? If you answered yes to these questions it is a good chance the vehicle computer needs replacing. (I had the same issue, different vehicle).

If not, do you have any more information?

I hope this helps!!!

Jan 22, 2013 | Cars & Trucks

1 Answer

Why do my 91 honda civic starts but stalls out when i drive it


It can be low fuel pressure or clogged fuel filter or issue with IAC valve.

It can be the issue with weak battery or faulty battery or if battery is ok,then its faulty starter causing the issue.


From start to end troubleshooting these problem i suggest you to click the link below and follow its procedure:-----



What to Do When Car Turns Over But Won't Start?

http://technoanswers.blogspot.com/2012/11/what-to-do-when-car-turns-over-but-wont.html


-----------
Car starting issues?

http://technoanswers.blogspot.in/2012/02/car-starting-issues.html

------------
Car Starting Problems

http://whoisbyme.blogspot.in/2012/06/car-starting-problems.html


--------
1991 Toyota Trecel: Engine Starts fine but dies when gets Warm?

http://whatisbyme.blogspot.in/2012/05/1991-toyota-trecel-engine-starts-fine.html

----------
1994 Toyota Pickup: Starts fine but dies in few seconds?

http://howtobyme.blogspot.in/2012/05/1994-toyota-pickup-starts-fine-but-dies.html


---------
1999 Chrysler Cirrus: 8 IGN Fuel Starter Fuse Blows?

http://whatisbyme.blogspot.in/2012/06/1999-chrysler-cirrus-8-ign-fuel-starter.html


-----------
2001 Toyota Camry: No start After replacing Battery?

http://whatisbyme.blogspot.in/2012/05/2001-toyota-camry-no-start-after.html

----------
1989 Toyota Pickup Truck: Turns over but not start? http://whatisbyme.blogspot.in/2012/05/1989-toyota-pickup-truck-turns-over-but.html

--------------
Car dead and will not Start? http://whatisbyme.blogspot.in/2012/05/car-dead-and-will-not-start.html

--------
1995 Lexus LS400: Running Hot?

http://whatisbyme.blogspot.in/2012/05/1995-lexus-ls400-running-hot.html


----------
2001 Toyota Prius will not start? http://whatisbyme.blogspot.in/2012/05/2001-toyota-prius-will-not-start.html

---------
1996 Jeep Grand Cherokee: Engine will not start? http://repairhelpcenter.blogspot.in/2012/06/1996-jeep-grand-cherokee-engine-will.html ------------- Mitsubishi will not start

http://www.howtorepairguide.com

---------

These will help.

Thanks.

Nov 25, 2012 | 1991 Honda Civic

2 Answers

1991 lexus ls400 stalls as if it dont want to pick up while im driving like the gas not flowing the right way


sounds like the fuel filter is bad or the throttle position sensor is going bad.

Feb 28, 2011 | 1991 Lexus LS 400

1 Answer

Car doesn't respond when gas pedal is pushed when it is driven in hot weather; engine does not stall (1991 lexus ls400


I had the same problem with my 1992 LS400. My Lexus mechanic fixed it by replacing the MAF(Mass Air Flow).

This used to drive me crazy when the weather was hot.

Oct 25, 2010 | 1991 Lexus LS 400

2 Answers

My 91 ls400 acts like it vaper locks dies out has to sit awial then actes like it has low power for awial then serges to normal what may be the problem?


this is a computer problem. 91-96 lexus ls400 are known for having their computers go out on them. I would have never believed it but my ls400 did the same thing. I sent the computer to Auto Computer Exchange in Davie FL. They reprogramed it for $310 sent it back to me in a day. It fixed the car. I have had no problems out of the car. I now work on ls400 on the side to fix the same problem for other people.

Oct 10, 2009 | 1991 Lexus LS 400

1 Answer

Replace/fix starter on 1991 Lexus LS400


Not too bad. Not much room, just enough to drop the starter. It is probably easier to go up through exhaust if you can get your exhaust shield off the manifold .

Aug 07, 2009 | 1991 Lexus LS 400

1 Answer

91 lexus ls400 "fuel sensor?"


call your local dealer for the sensor.

Apr 11, 2009 | 1991 Lexus LS 400

1 Answer

1991 lex ls400 cannot shift into ''D'' or ''P'' after small accid


sounds like you have bent something underneath or broke a support bracket

Mar 17, 2009 | 1991 Lexus LS 400

1 Answer

1991 LS400 sudden power loss


You just go to the link I attached I'm sure you will get the solution of your problem 1991 LS400

Oct 11, 2017 | 1991 Lexus LS 400

Not finding what you are looking for?
1991 Lexus LS 400 Logo

318 people viewed this question

Ask a Question

Usually answered in minutes!

Top Lexus Experts

yadayada
yadayada

Level 3 Expert

76848 Answers

ROBERT GARCIA
ROBERT GARCIA

Level 3 Expert

907 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22246 Answers

Are you a Lexus Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...