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LS - 1st and 2nd Gen (1990-2000) Discussion topics related to the 1990 - 2000 Lexus LS400
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MAF, clean or replace?

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Old Oct 6, 2020 | 10:55 AM
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Default MAF, clean or replace?

Exhaust smells strong
99

Last edited by Sin1UZFE; Oct 7, 2020 at 07:55 AM.
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Old Oct 6, 2020 | 01:56 PM
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Originally Posted by Sin1UZFE
Exhaust smells strong
Might want to try and figure out exactly why before throwing parts at it, any codes and gave you looked at long term trims yet?
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Old Oct 6, 2020 | 05:02 PM
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Zero effort thread
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Old Oct 6, 2020 | 05:09 PM
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Originally Posted by Striker223
Might want to try and figure out exactly why before throwing parts at it, any codes and gave you looked at long term trims yet?
Just p0446 since I can't find a new charcoal canister. Stuck with that I guess. Has always smelled like that at least since I've had it.
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Old Oct 6, 2020 | 05:10 PM
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Originally Posted by sdls
Zero effort thread



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Old Oct 6, 2020 | 06:12 PM
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Originally Posted by Sin1UZFE
lol
anyway the charcoal canister issue is probably the cause of the smell
the maf won’t make the exhaust smell since the car has catalytic converters anyhow
*if your car is running stupid rich it could make the cats stink but you’d have other codes to indicate it

if you want to clean the maf as part of a preventive maintenance routine then go ahead if it isn’t the early KV maf

Last edited by sdls; Oct 6, 2020 at 06:15 PM.
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Old Oct 7, 2020 | 05:13 AM
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Might as well clean the MAF, see what happens. It's not like you're throwing an unneeded expensive part at it. I don't remember off hand what year your car is ( hard to remember everybody's car) but if it has the older AFM don't clean that.
I do agree with sdls about the canister could be causing the smell.
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Old Oct 7, 2020 | 07:56 AM
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Originally Posted by deanshark
Might as well clean the MAF, see what happens. It's not like you're throwing an unneeded expensive part at it. I don't remember off hand what year your car is ( hard to remember everybody's car) but if it has the older AFM don't clean that.
I do agree with sdls about the canister could be causing the smell.
Its a 99 ls400

Can't do anything about charcoal canister. Can't find a new one anywhere and have been burned by 2 used ones.

Last edited by Sin1UZFE; Oct 7, 2020 at 08:21 AM.
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Old Oct 7, 2020 | 09:07 AM
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Originally Posted by Sin1UZFE
Its a 99 ls400

Can't do anything about charcoal canister. Can't find a new one anywhere and have been burned by 2 used ones.
I wonder if State Emmissions Agencies give a pass if the part is unavailable from dealer...

The unit apparently use(?) activated charcoal and if disassembly/reassembly of housing is possible then swapping out the activated charcoal may offer a solution.

This topic deserves it's own post.

Another option is to look at Celsior configuration....
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Old Oct 7, 2020 | 09:09 AM
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Originally Posted by YODAONE
I wonder if State Emmissions Agencies give a pass if the part is unavailable from dealer...

The unit apparently use(?) activated charcoal and if disassembly/reassembly of housing is possible then swapping out the activated charcoal may offer a solution.

This topic deserves it's own post.

Another option is to look at Celsior configuration....
I'm sure not CA.
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Old Oct 7, 2020 | 01:10 PM
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Originally Posted by Sin1UZFE
I'm sure not CA.
I'm sure glad I live on the east coast. No emission test after 25 year old vehicles in Ct.

I see only 1 person voted in the poll, so I guess this is just a regular thread.
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Old Oct 7, 2020 | 01:22 PM
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Originally Posted by deanshark
I'm sure glad I live on the east coast. No emission test after 25 year old vehicles in Ct.

I see only 1 person voted in the poll, so I guess this is just a regular thread.
Only 1975 an older in.CA
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Old Oct 7, 2020 | 06:34 PM
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Originally Posted by YODAONE
Another option is to look at Celsior configuration....
Our Celcior's EVAP system is totally different from your LS400's. To look at it will be a vain.
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Old Oct 7, 2020 | 11:22 PM
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Originally Posted by Yamae
Our Celcior's EVAP system is totally different from your LS400's. To look at it will be a vain.
..........
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Old Oct 14, 2020 | 10:01 AM
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Originally Posted by Yamae
Our Celcior's EVAP system is totally different from your LS400's. To look at it will be a vain.
It is different which explains my reason for suggesting it.

The Celsior emissions system is not as complex as the LS400, nor does it appear to employ a charcoal canister.


There are fewer parts (hopefully not discontinued) that might be configured.

While this changes the emissions function, Toyota elected to discontinue a critical emission component at exactly the time when many are just beginning to fail.

So what is the solution?
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