Help Me ID This Valve ...90 LS
06-17-09, 06:23 PM
#1
Help Me ID This Valve ...90 LS
I notice the hose connecting the valve in the picture completely cracked on my 90 LS 400. Can someone kindly identify which PCV valve it is and if you know it a part number would be great.
Larger picture
Thanks!!
Larger picture
Thanks!!
06-17-09, 06:33 PM
#2
IIRC, that is not a valve. I think that is your coolant temp sensor.
https://www.clublexus.com/forums/ls4...ange-pics.html
https://www.clublexus.com/forums/ls4...ange-pics.html
06-17-09, 08:47 PM
#3
Move your finger!! But based on the diagram linked below, it looks like it may be a Bimetal Vacuum Switching Valve No. 1.
w w w . t o y o d i y .com/parts/p_U_1991_LEXUS_LS400_UCF10L-AEPGKA_1708.2.html
(remove the spaces)
@trukn1, the coolant temp sensor is on the left side, he's pointing on the right side.
w w w . t o y o d i y .com/parts/p_U_1991_LEXUS_LS400_UCF10L-AEPGKA_1708.2.html
(remove the spaces)
@trukn1, the coolant temp sensor is on the left side, he's pointing on the right side.
06-18-09, 01:02 AM
#4
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It is the #1 switch valve or 'bi-metal vacuum switching valve' as AzHotLS pointed out. It uses the coolant temp to activate it. The hose fittings snap off all the time! 
06-22-09, 10:39 AM
#6
As he said....
However, I have found that some cars have them, others do not. I choose to do the EGR delete, and I simply removed the vacuum lines and haven't had a problem. This is supposed to slow the idle down when the coolant reaches a certain temp, which the computer does anyways. However, this is an emission thing that is done in the states, I do believe. It takes vacuum from the intake, and applies it to the fuel pressure regulator, well I just hooked mine up to constant vacuum. I have found that most 1UZs in Japan, Australia, Europe, and even in Canada don't have them, but LS4's got them for some reason.
However, I have found that some cars have them, others do not. I choose to do the EGR delete, and I simply removed the vacuum lines and haven't had a problem. This is supposed to slow the idle down when the coolant reaches a certain temp, which the computer does anyways. However, this is an emission thing that is done in the states, I do believe. It takes vacuum from the intake, and applies it to the fuel pressure regulator, well I just hooked mine up to constant vacuum. I have found that most 1UZs in Japan, Australia, Europe, and even in Canada don't have them, but LS4's got them for some reason.
Last edited by 3UZFTE; 06-22-09 at 10:47 AM.
08-28-09, 11:51 AM
#7
okay i got the same problem
Well, i was trying to clean the area up a bit and i accidentally pulled the two vacuum hoses that connect to the valve switch...
I thought i had been the cause of breaking the nibbles off but apparently they were broken before since they tried glueing it back on. And yes, it was barely holding on.
Anyway, i did some research and here are the pricing results..
Bimetallic Vacuum Valve Switch (Looks like an F)
#90925-00568
Lexus of Glendale - 95 plus tax
Sewell Lexus - 58 plus shipping (Thanks to clublexus-discount code)
Norwalk Toyota - 68 plus tax
Penkse Toyota - 65 Plus Tax
and....CARSON TOYOTA (thanks to club lexus name) $53 plus tax
Obviously, the carson toyota is the cheapest. amazing how glendale lexus has it for almost DOUBLE! wowzers..
Anyway, im just posting to let anyone know in case any of you have the same problem.
cheers
I thought i had been the cause of breaking the nibbles off but apparently they were broken before since they tried glueing it back on. And yes, it was barely holding on.
Anyway, i did some research and here are the pricing results..
Bimetallic Vacuum Valve Switch (Looks like an F)
#90925-00568
Lexus of Glendale - 95 plus tax
Sewell Lexus - 58 plus shipping (Thanks to clublexus-discount code)
Norwalk Toyota - 68 plus tax
Penkse Toyota - 65 Plus Tax
and....CARSON TOYOTA (thanks to club lexus name) $53 plus tax
Obviously, the carson toyota is the cheapest. amazing how glendale lexus has it for almost DOUBLE! wowzers..
Anyway, im just posting to let anyone know in case any of you have the same problem.
cheers
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