Question about 1991 Lexus LS 400

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Why does my 1991 lexus LS400 engine rev and rpm needle rise up when driving at night with headlights on?

When driving at night only the engine revs making rpm needle jump to 1 but has trouble picking up speed to 40mph

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

mkv0525
  • 358 Answers

SOURCE: R & R 1991 Lexus Ls400 Gear shift knob

slide the lower part of shifter handle down and you will find two screws, but there is 2 wires coming in from center console for overdrive button.you have to remove the center console cover and remove the 2 wires from connector and then pull up threw handle.when you go back together you will have to guide them back threw the handle.

Posted on May 21, 2009

MNfisherman
  • 11896 Answers

SOURCE: 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 .

Posted on Aug 07, 2009

  • 82 Answers

SOURCE: my lexus ls400 1991 the two electri fan all time is on

check the thermostat to see what temp it is opening at?? should be around 160- 180 degrees..

Posted on Jul 19, 2010

  • 1 Answer

SOURCE: how to repair code13 - RPM signal no.2 Lexus Ls400

HOW TO FIX CODE 13 1995 LEXUS SC400

Posted on Nov 30, 2010

  • 3 Answers

SOURCE: car doesn't respond when gas

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.

Posted on Dec 06, 2010

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1998 Jaguar XJ8 won't rev over 3000 rpm ... engine cuts out and shudders at 3000 rpm won't accelerateobd code p0332 2002 jaguar x type 3.0 l P0332 - Knock ... Car is boging out in park and will not go over ... driving, don't worry about it.

Rev Won't go up

www.jaguarforum.com/showthread.php?t=14662

Dec 15, 2015 | Jaguar Cars & Trucks

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Battery barely starting car, engine only rev to 2500 rpm


Loose or corroded battery cables, Loose fan belt not turning alternator fast enough, Bad alternator, check the battery with a Voltmeter, voltage with engine stopped. should be slightly over 12V Start engine and check again.. shoiuld be over 14V. this is if the alternator is putting out a charge. Chech the output at the alternator. the BATT connection. usually a larger red wire. should be 14V+ with engine running. Since the A/C works fine with the engine running.. I would have the battery checked.. sounds like bad battery.

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My 1991 lexus ls400 shifts into gear fine, but slips and over revs before moving


Time for a rebuild

You never change fluid in a trans that
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Dec 23, 2012 | 1991 Lexus LS 400

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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

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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

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

Multiple problems on car: Car runs hot, A/C blows hot and car starts surging?

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

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

Delay starting on Toyota Prius?


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

-----------

Honda car will not start intermittently?

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

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

Vehicle Starts, Runs and Loses Power

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

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

Intermittent starting issues on Volvo 760?

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

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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.

Nov 28, 2012 | Cars & Trucks

1 Answer

My1991 mazda 626 will not rev up over 3000 rpm


DO YOU MEAN WHEN YOU ARE ACCELERATING? Or do you mean sitting and reving the engine? If you are just reving the engine in park then the rev limiter is kicking in.

Feb 07, 2012 | 1991 Mazda 626

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

How much should i rev be4 i need to change gear


You could say, as a rough estimate, 2500-3000 RPM is probably the most you should rev the engine in a 323.




Apr 22, 2009 | 1991 Mazda 323

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