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I've read other posts of the power steering valve and how to repair it but I was kind of perplexed by reading all them and I want to make it clear what part am I buying and is it available at the Toyota dealer?
Power Steering Valve On 91
#1
AlmightyLexus97 
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Car Model:LS400
Posted 13 June 2004 - 06:17 PM
MultiQuote
#2
lex4me
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Car Model:LS400
Posted 13 June 2004 - 10:26 PM
You are looking for an air control valve. It is mounted on the passenger side of the PS pump and is downward facing in about the 7:30 position. You can get the part from Toyota, but I found Irontoad.com cheaper by about $20. Good luck!
#3
99lsguy
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Posted 13 June 2004 - 10:50 PM
lex4me, on Jun 13 2004, 10:26 PM, said:
You are looking for an air control valve. It is mounted on the passenger side of the PS pump and is downward facing in about the 7:30 position. You can get the part from Toyota, but I found Irontoad.com cheaper by about $20. Good luck!
Absolutely correct!!!
Normally a $95 part.......so anything less is good!
#4
yucaton_tom
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Posted 14 June 2004 - 06:45 AM
I just replaced the air regulator valve assembly on my 93 LS400 - my mechanic cross referenced parts between Toyota and Lexus and found that the Toyota Tercel uses the same valve assembly - Part # 17630-16040 - $92.00 over the counter at Toyota in Houston, Texas.
Good Luck!
Good Luck!
#5
markkr64
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Car Model:ls400 1990
Posted 17 June 2004 - 06:35 PM
Is this the common problem that needs to be fixed in regards to the powersteering leak? With the help of a friend who knows about cars, i am going to try and fix this myself. A couple questions, A: is it possible without a special tool and B: do i need any other parts to replace.
If someone could give a quick go over as to what to do to fix this, I would definately appreciate it. Its amazing that everyone has nearly the same problem. I am not interested in replacing the alternator, even though I have a feeling it has been leaked on, becuase I get the white smoke. Is that ok too?
SOrry for all the questions, I appreciate all the advice you guys give, and you guys have made me enjoy fixing things for the first time in my car. Hopefully I'm not biting off more than I can chew. (but my friend is really good at cars)
If someone could give a quick go over as to what to do to fix this, I would definately appreciate it. Its amazing that everyone has nearly the same problem. I am not interested in replacing the alternator, even though I have a feeling it has been leaked on, becuase I get the white smoke. Is that ok too?
SOrry for all the questions, I appreciate all the advice you guys give, and you guys have made me enjoy fixing things for the first time in my car. Hopefully I'm not biting off more than I can chew. (but my friend is really good at cars)
#7
99lsguy
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Posted 17 June 2004 - 11:09 PM
markkr64, on Jun 17 2004, 06:36 PM, said:
almighty if you have started your fix on it, i'd love to hear how it is going or went. Good luck wiht itl
Here's a link:
http://us.lexusowner...36&hl=air+valve
You can just plug the two connections leading out - this would affect you steering @ idle though.
The valve is letting PS fluid pass up and into your valves........this is why your getting the puffs of smoke......
#8
jun
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Car Model:1994 LS400
Posted 14 March 2006 - 02:24 AM
If you plug the two connections, you said it will affect the idle, If I do that will something else go wrong eventually?
Here's a link:
http://us.lexusowner...36&hl=air+valve
You can just plug the two connections leading out - this would affect you steering @ idle though.
The valve is letting PS fluid pass up and into your valves........this is why your getting the puffs of smoke......
99lsguy, on Jun 18 2004, 01:09 PM, said:
markkr64, on Jun 17 2004, 06:36 PM, said:
almighty if you have started your fix on it, i'd love to hear how it is going or went. Good luck wiht itl
Here's a link:
http://us.lexusowner...36&hl=air+valve
You can just plug the two connections leading out - this would affect you steering @ idle though.
The valve is letting PS fluid pass up and into your valves........this is why your getting the puffs of smoke......
#9
bicol-ini
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Car Model:1996 LS 400
Posted 14 March 2006 - 01:28 PM
its ok to plug it in if you follow the vaccum hose it goes to the throttle body, which aids in cold start up, so it will affect your idle instead of a low 600 rpm it will a little higher around 800 or so, IMHO :cheers:
#10
larryp
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Posted 14 March 2006 - 02:56 PM
Plugged mine a couple of years ago cause i was too cheap to buy the new valve. 
Plug the two vacumn lines - one at the intake manifold and one on the throttle body. I replaced the valve with a bolt that had matching threads. If the valve is bad, the high pressure makes it almost impossible to leave the valve on and try to plug the two lines coming out.
Haven't really noticed any difference in idle. The valve is designed to increase idle at low speed when the steering wheel is turned to prevent the RPM from dropping too low (or stalling out) because of the additional load on the engine. As i said, i haven't had that problem or really seen any difference.
Plug the two vacumn lines - one at the intake manifold and one on the throttle body. I replaced the valve with a bolt that had matching threads. If the valve is bad, the high pressure makes it almost impossible to leave the valve on and try to plug the two lines coming out. Haven't really noticed any difference in idle. The valve is designed to increase idle at low speed when the steering wheel is turned to prevent the RPM from dropping too low (or stalling out) because of the additional load on the engine. As i said, i haven't had that problem or really seen any difference.
#11
RDM
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Posted 19 March 2006 - 07:00 PM
This is a good read, I broke one of the janky plastic nipples that one of the hoses leads off and just plugged it, nice to know it's not afffecting anything.
#15
nikk777
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Posted 11 October 2006 - 02:24 PM
Thanks to this and several other posts on this subject which helped me tremendously. I thought it only fair to share my success and methods to maybe help the next in line. My 94 LS400 started blowing puffs of white smoke on start up and continuing to do so while at idle but not as bad. After reading many posts, I decided it was either the air control valve (idle control valve) or one of the coil packs. I bought both parts. Air control valve I got for $80 at a toyota dealership (part# 17630-16040) and the coil pack was $39.99 at Autozone (part#C903 i think). Got home, pulled plugs on each side to check for unburnt gas which would tell me it was the coil pack. All plugs looked fine. For those who haven't pulled the plugs before, they are in the middle of the valvle cover. To get to them...remove the plastic piece towards the front of the engine, the one between the valve cover and the intake and the one running down the middle of the valve cover.(this is for the driver's side, passenger side is the same but you must also remove the air filter and tubing leading up to the engine) You will need a 10mm socket for most bolts, a 5/8 spark plug socket, and a 17mm wrench for the air control valve.
The air control valve can be located from pictures on various posts. I found it by following the two small hoses leading from the intake down to it. It is screwed into the bottom of the power steering pump below the power steering pump resevoir. I first tried to access it from the top only to have a difficult time and almost started removing the power steering pump resevoir. Don't bother with all of this. Take the large plastic under belly completely off with the 10mm socket and access it from the bottom. Find a short 17mm wrench and a good light. BEWARE...fluid will pour out on you when you get the valve out. It covered my right side.. =) Lovely feeling at 2am with work closing in at 8am and no sleep. Anyhow, the valve is a simple unscrew and replace then replace the rubber hoses. You might need pliers for the hoses, I pulled them off and reattached with just my hands.
PS. I knew it was in fact the air control valve as when I removed it, the center piece creating the valve close off fell out and there was fluid in the hoses leading to the intake.
Good luck. Hope this helps the next person.
Nikk
The air control valve can be located from pictures on various posts. I found it by following the two small hoses leading from the intake down to it. It is screwed into the bottom of the power steering pump below the power steering pump resevoir. I first tried to access it from the top only to have a difficult time and almost started removing the power steering pump resevoir. Don't bother with all of this. Take the large plastic under belly completely off with the 10mm socket and access it from the bottom. Find a short 17mm wrench and a good light. BEWARE...fluid will pour out on you when you get the valve out. It covered my right side.. =) Lovely feeling at 2am with work closing in at 8am and no sleep. Anyhow, the valve is a simple unscrew and replace then replace the rubber hoses. You might need pliers for the hoses, I pulled them off and reattached with just my hands.
PS. I knew it was in fact the air control valve as when I removed it, the center piece creating the valve close off fell out and there was fluid in the hoses leading to the intake.
Good luck. Hope this helps the next person.
Nikk