Question about 1991 Lexus LS 400

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Why my 1991 lexus ls 400 will not get any spark to the coils packs

Why my 1991 lexus ls 400 will not get any spark to tthe coil packs i chang crank sensor, both coil packs and both ignition modules when i try to start it it just turn over continous but no start it is seems like what ever makes the coil packs get spark is not working can anyone help me? thanks.

Posted by rod stewart on


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Jaye t rock

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Lexus / Toyota make something call igniters and you have to make sure you are igniters or operational and you have to make sure that your fuel pump is working properly because if you're not getting enough fuel you can have all the spark in the world and you're not going to get a combustion

Posted on Feb 06, 2018



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All kinds of repair manuals are available here.Have a look of this may be you will get something useful. They also provide discount
1991 Lexus LS400 Service Repair Manual Download

Posted on Feb 02, 2018


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Juan Guillen

  • 373 Answers

SOURCE: Fuel Pump

On your 91 Lexus ls 400.
If you remove the Rear passanger seat.
You will have axces to the fuel pump.
Remove the metal cover . Disconnect the wire harnes,
Disconnect the lines.
removing the nuts you will able to remove the fuel pump.

Ok.. I hope this help on your question.
Thank you for use fixya...

Posted on Aug 19, 2008


Jeremy Dellow

  • 1586 Answers

SOURCE: lexus ls 400 - it's $25 for a year-long subscription and gives you troubleshooting charts, parts diagrams, exploded diagrams of every system on the car, etc - it's an online factory service manual. Excellent resource that is well worth the small cost.

Posted on Sep 08, 2008


  • 69 Answers

SOURCE: radio locked 1991 lexus ls400

Consult your owners manual--in the radio section there is a master code listed---use that then reset the radio with your own code---

Posted on Jan 14, 2009


  • 35 Answers

SOURCE: cobalt no spark

I was going to say crank sensor, but you changed it. What have you done to it latley? Or did this just start? I kinda want to say PCM for some reason. Any welding done on the car latley?

Posted on Feb 26, 2009


Mike Vincent

  • 358 Answers

SOURCE: 1991 lexus ls 400

key and or tumblers are worn. need to replace one or both.

Posted on May 21, 2009

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Related Questions:

1 Answer

What is the function of the fuel pump and ignition coil pack for my 92 ls 400 lexus

The fuel pump pumps the fuel from the fuel tank under pressure up to the fuel rail and injectors.
The coil packs provide a electrical charge (about 40,000 volts) to the spark plugs. It is this charge that makes the spark plug spark.

May 27, 2015 | 1992 Lexus Ls 400

1 Answer

Pls help me my car fault p1604 lexus ls 460 2010

Reviewing the tech info that comes up on a google search, this code is just about worthless for diagnostic purposes. Go back to basics. Does fuel pressure drop just before car dies? Once dead, if you crank it do you still have spark at the plugs? Most likely causes if electrical are coil/ignition module, cam/crank sensor, coolant temp sensor, bad converter or muffler.

Jan 28, 2015 | 2010 Lexus LS 460

1 Answer

What causes ignition modules to go bad in 1991 delta 88

Generally the cause of an electrical component to fail is high heat or extreme voltage load.
Is the coil pack and module getting too hot from the heat of the engine ?
Is it shorting out because of oil or wet surfaces ?
Could you be loosing voltage to the module from the key switch ?
Are you loosing ground signals from the computer ?

Jan 22, 2013 | Oldsmobile Cars & Trucks

2 Answers

My lexus ls 400 will run for 30 minutes then stall and it will take at least 30 minutes for it to start

check engine temperature could be overheating or you have faulty throttle control motor.could have faulty mass air flow sensor.have vechicle code scan before buying new parts.

Oct 08, 2012 | 1990 Lexus LS 400

1 Answer

My 91 lexus ls400 stopped firing up. It turns over but no go.

check/change the crank sensor and check your ignition module

Jan 15, 2010 | 1991 Lexus LS 400

2 Answers

Why is there No Spark in a 1991 Buick Lesabre after i changed the coil pack crank shaft sensor and ignition control module?

did u line the crankshaft sensor up? if not the sensor could have been damaged and the harmonic balance ,some models show a cam sensor ,check that,are u sure its not fuel related?

Jul 03, 2009 | 1991 Buick LeSabre

1 Answer

1991 lexus ls400 doesn't accelerate

Clean, inspect and, or, Replace your crank sensor or, crank sensor wiring A loose crank sensor bracket or, a start relay has caused this before

Jun 15, 2009 | 1991 Lexus LS 400

1 Answer

Cobalt no spark

I was going to say crank sensor, but you changed it. What have you done to it latley? Or did this just start? I kinda want to say PCM for some reason. Any welding done on the car latley?

Jan 18, 2009 | 2006 Chevrolet Cobalt

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