Question about 1992 Lexus Ls 400

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1992 LEXUS LS400 STALLS WHEN HOT & IDLE SURGING

After driving the car for over 1 hour it started to loose power on accell. There was no response at all. Then the vehicle stalled & would not restart. After sitting for a few minutes it started back up with no problem. When I got home I reved up the engine to 3000 rpm's for about 10-15 minutes & then let it idle to let it get heat soaked. After about 2 minutes the idle started to dip to the point of almost stalling & then it would recover. It did this about 5 to 8 times before it stalled out. Went to restart the car & it started right up with no problem, but it started dipping the idle again like before. It went through this about 5 times then it was fine. Checked fault memory, no faults stored. This morning I went to start it and it started right up but now the idle was surging up & down from idle to about 2500 - 3000 rpm's. And has not stopped doing this. I checked fault memory again, no fault stored. Any help will be accepted.

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  • gng623 Jun 12, 2009

    If the timing jumped why would it have an effect only once the engine is heat soaked?

  • jimmy isbell
    jimmy isbell Apr 28, 2014

    i have the same problem only happens on hot day. its not gas problem because it quits instant

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Had same problem on 93 LS400, timing was off one tooth on left camshaft gear. Replaced belt and reset and no more problems. (Spent 1200.00 on repairs I did'nt need)

Posted on Feb 25, 2010

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I have the same issue and have not been able to trace it down.I have checked the ecu,airflow meter,egr,fuel pump it may be in the wiring or a relay although I tried a fuel pump relay.Have you fixed yours yet?

Posted on Jan 19, 2010

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Timing belt has jumped time.

Posted on Jun 12, 2009

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Once vehicle is warm stalls and loose power


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http://whoisbyme.blogspot.in/2012/07/vehicle-startsruns-and-loses-power.html

--------------

Its a hot start issue.

Can be related to low fuel pressure or problem with crank sensor.


Also it can be weak battery or starter.


But possibilities are to be inspected to confirm what exactly it is.------


To troubleshoot and confirm the issue,i suggest you refer few solved help links with similar types of problem like yours:------


Click the link below:------


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

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

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===========

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Vw polo, 1.4 petrol, 1996. when slowing down revs drop and car stalls and can be difficult to start again. when driving it can suddenly get abit jerky, no power from accelerator then loses the revs and...


HOT/WARM START ISSUE


Its a hot start issue.

Can be related to low fuel pressure or problem with crank sensor.


Also it can be weak battery or starter.


But possibilities are to be inspected to confirm what exactly it is.------


To troubleshoot and confirm the issue,i suggest you refer few solved help links with similar types of problem like yours:------


Click the link below:------


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

------------

1995 Lexus LS400: Running Hot?

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

------------

2002 Toyota Camry: Puff of Blue or White Smoke while Starting?

http://whatisbyme.blogspot.in/2012/05/2002-toyota-camry-puff-of-blue-or-white.html

------------

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http://schematicsdiagram.blogspot.in/2012/04/multiple-problems-on-car-car-runs-hotac.html

--------------

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http://schematicsdiagram.blogspot.in/2012/02/delay-starting-on-toyota-prius.html

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http://technoanswers.blogspot.in/2012/02/honda-car-will-not-start-intermittently.html

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http://whoisbyme.blogspot.in/2012/07/vehicle-startsruns-and-loses-power.html

--------------

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http://schematicsdiagram.blogspot.in/2012/02/intermittent-starting-issues-on-volvo.html

-----------

Car starts and cuts off immediately?

http://repairhelpcenter.blogspot.com/2012/01/car-starts-and-cuts-off-immediately.html

-----------

Car won't start when cold?

http://schematicsdiagram.blogspot.com/2011/12/car-wont-start-when-cold.html

===========

These details will help.

Thanks.

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1 Answer

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