All LS400 owners with bad gas mileage READ THIS!

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09-14-08, 12:31 PM

#31

avalon42

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Quote:

Originally Posted by Luke_in_SD

I am still confused on which sensor is being replaced.

Are you guys talking about the one on the top of the block which I don't know where it is, or are you talking about the one in the bottom of the radiator?

It's right here.

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09-14-08, 12:33 PM

#32

avalon42

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Quote:

Originally Posted by paulg123

Everyone who has replaced this part or is going to, please let us know your MPG improvement. I get about 19mpg average, but with different driving I can get up to 23 in my '94.

420 miles on the last full tank. That was while running the AC for about 1/2 of those gallons too. MPG dramatically improved.

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09-18-08, 05:52 PM

#33

Luke_in_SD

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I went ahead about bought the sensor at autozone today for 29.99.
I saw the other thread on this and it seems like its working for more and more people and for the last 6 months my car has been getting 15-16mpg so I thought I would give it a shot.

I'll let you guys know what happens and if it works I'll let the SC400 guys know about the good news. I own SC400 btw not an LS400 but same engine.

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09-18-08, 07:05 PM

#34

Och

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Quote:

Originally Posted by Luke_in_SD

Big mistake buying it from autozone. Its not OEM, its a generic sensor, and I bet it wont work properly.

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09-18-08, 07:06 PM

#35

Och

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Quote:

Originally Posted by jasonburt

Their are 3 coolant sensors on the LS400. One is for the fuel and timing maps on the computer. One is for a timer for the cold start injector. One is for the tempurature guage on the instrument cluster.

There's a fourth one, that controls radiator fans, its located in the bottom of radiator.

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09-18-08, 07:32 PM

#36

Luke_in_SD

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The guy 2 posts above me "avalon42" used an autozone sensor and look at his results

and so did

zoraone

https://www.clublexus.com/forums/sho...d.php?t=377171

Last edited by Luke_in_SD; 09-18-08 at 07:56 PM.

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09-19-08, 07:58 AM

#37

avalon42

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Yup. For the record, I bought the sensor at Autozone. No ECU throw codes, but then again, didn't have any to begin with.

I think all it is is a thermosister, so generic or not, it's not an overtly complicated piece of equipment.

But Och may have a point, anyone willing to buy an OEM new and let us know if you have different results (better MPG)?

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09-19-08, 08:28 PM

#38

jasonburt

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I'm really happy to see everyone has been getting the results I have with this sensor. We are all extending the life of our Lexus engines,happiness,pocket book, and the environment. Hey were also sticking it to the oil companies!