HELP-car cutting off while driving
Thread Starter
Lead Lap
Joined: Dec 2010
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From: EVERYWHERE
HELP-car cutting off while driving
Hello all,the wifes car 92 ls400 just cut off on her while driving to work and it wont start back up feels like it catches for a sec but wont stay on,i remeber her running out of gas a month or so and said it cuts off on her from time to time, could this be the fuel pump went out? Should i start with the fuel filter? Or is there anything else that could cause this? Desperately need help fellas
Lead Lap
Joined: Nov 2009
Posts: 486
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From: IN
First thing is to check for codes -> http://www.lexls.com/tutorials/intro/codereading.html
If no codes, here is list of things to consider -> https://www.clublexus.com/forums/ls4...ml#post8263261
If no codes, here is list of things to consider -> https://www.clublexus.com/forums/ls4...ml#post8263261
Thread Starter
Lead Lap
Joined: Dec 2010
Posts: 403
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From: EVERYWHERE
Thanks,i do not have a scanner but should i hear the pump come on from the rear if i turn the key? Seems like i dont hear anything,i swear when i use to drive the car i would her the pump noise?
You don't need a scanner. The procedure to read codes is i the first link he posted. The code, if you have one would go a long way in diagnosing what's wrong. You should hear the pump priming itself when you turn the key to the on position. Maybe you could turn the key and have your wife listen in the trunk for it.
Lead Lap
Joined: Nov 2009
Posts: 486
Likes: 3
From: IN
As mentioned, you do not need a scanner for your 92. Just follow the jumper instructions in that first link. Its worth the effort to see if the ECU is trying to tell you something.
Last edited by randal; Jan 6, 2015 at 08:53 AM.
Thread Starter
Lead Lap
Joined: Dec 2010
Posts: 403
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From: EVERYWHERE
Well i got the car home now,i remembr i use to hear the fuel pump before i turn the car on because it has that fuel pump sound to it but now when i turn the key it does not make that noise instead its making a on and off noise and clicking from the raer?? Is that the noise of a bad pump???
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Lead Lap
Joined: Nov 2009
Posts: 486
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From: IN
It sure is looking like it might be the pump but first, you need to check something.
Locate the fuel pump relay. Good, now that you found it...you did find it didn't you? ;-) (hint: located on front of passenger side inner fender well). Pull the relay and with an ohmmeter, check the resistance from pin 4 to ground. That will place the meter directly across the pump winding. Report back with the reading.
Locate the fuel pump relay. Good, now that you found it...you did find it didn't you? ;-) (hint: located on front of passenger side inner fender well). Pull the relay and with an ohmmeter, check the resistance from pin 4 to ground. That will place the meter directly across the pump winding. Report back with the reading.
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Thread Starter
Lead Lap
Joined: Dec 2010
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From: EVERYWHERE
Yea it got to late for me to test that module,but say it was the pump what are the best to run with? I seen 2-3 brands at autozone, and i heard you can change it threw the back seat or trunk? Is that true? Because she just filled up the tank uhhhh lol hate to drop the tank on a full tank
Lead Lap
Joined: Nov 2009
Posts: 486
Likes: 3
From: IN
Personally, I would stay away from Autozone, Advanced, PEP, etc for a fuel pump. And stick with an OEM type. Yes, more money but considering your time and the reliability, it will be well worth a bit more.
[edit] removed reference to SC400..not applicable. Thanks Timmy.
[edit] removed reference to SC400..not applicable. Thanks Timmy.
Last edited by randal; Jan 7, 2015 at 09:11 AM.
you do NOT have to remove your gas tank to get to the fuel pump! just access it from the inside by removing the back seat.
http://www.lexls.com/tutorials/body/rearseat.html
the pump can be accessed from the circular cover as seen here! ignore the red arrows.
http://www.lexls.com/tutorials/body/rearseat.html
the pump can be accessed from the circular cover as seen here! ignore the red arrows.
