ae80siq

iTrader: (1)

Plugged my ACV valve the other day because I thought that why my car was pouring foul smelling white smoke from the exhaust on cold starts. Even after it warms up there's a small amount of consistent smoking but that might be cause by the cold temperature.
But yeah, it's still doing it I don't know if it's leftover fluid in the intake manifold or if there's something else burning. It definitely doesn't smell like burning coolant though.
Is there any other known common problem?

johnnyg66

Might be mine does that some once and awhile. How long it id take you to plug the valve? Was it difficult for you? Thinking on that too. If it left over it may burn off or try some fuel cleaner like seafoam for 44k.

Just my two cents.

ae80siq

iTrader: (1)

It took two days because I Jerry rigged the valve with some JB Weld and I had to let it dry overnight. I imagine it would only take about 2 hours to plug, flush and bleed if you had access to a welder or other means of sealing off the valve.
The only problem I ran into was getting the hose off the resovoir during the flushing process. But yeah just follow the tutorials and you'll be golden

zukikat

My car was gulping down Power Steering Fluid when I bought it about 1.5 weeks ago with a reman'd pump installed by the used car lot before I bought it and it was still losing fluid really fast even with a new pump and no obvious signs of leaks or puddles.
The rack input seal was seeping but nowhere near enough to explain the fluid loss and all the steering fluid lines/hoses were fine.

The car was also smoking significantly out the tailpipes for several minutes on cold start but seemed to run fine and eventually seemed to pretty much quit smoking at idle and drove well overall the two times I test drove it.
We initially figured leaky valve stem seals although it seemed to smoke longer than I'm used to seeing bad valve stem seals do on my 7M and 2JZ I6 Supra engines but it did seem to quit smoking after a few minutes of idling and has very good compression and leakdown numbers so I figured "how bad can it be" and bought the car anyway...

Turns out the little idle-up vacuum thingy that screws into the power steering pump with the 2 vacuum lines connected to it (which was not included with reman'd pump so the used car lot reused original one off the old pump) was leaking internally and basically sucking/pumping power steering fluid directly into the vacuum system and into the throttle body and the engine was actually burning it, hence the smoke and rapid loss of steering fluid!!!
After replacing the mildly leaky steering rack input shaft seal and still losing a LOT of fluid with no puddles to be found and no boots leaking or swelling up we noticed the vacuum connections seemed wet and fluid came gushing out when we disconnected one of the two vacuum lines, DOH!

I still get a slight smoke for a few moments on cold startup but I'll be suprised if that's not just leaky valve stem seals which doesn't actually hurt anything and doesn't consume much oil at all, at least not on my Supras it doesn't...

Ironically, the used replacement vacuum valve we put on the LS's steering pump came off an old Supra and seems to work just fine so far.

johnnyg66

Thanks for your info. yeah, i had to cut off that hose it was hard and it cracked after many tries to remove it. Got a replacement hose cheap. I think i will just replace the valve later instead of plugging it.

ae80siq

iTrader: (1)

Just lost all my fluid haha the JB Weld blew right out of the valve. Took it to a machine shop and just had them weld it shut

zukikat

Talk about a permanent solution to a temporary problem...

ae80siq

iTrader: (1)

Noticed my intake manifold was hella nasty. Most likely from the ACV leaking
Cleaned it up and smoke is gone

Dtwillis5

That's the part with the Lexus symbol on it where the throttle body connect to, If yea how you cleaned it? Mine need it ASAP!!!

ae80siq

iTrader: (1)

I used Amsoil stuff that's just like Sea Foam.
but if you haven't done anything about the ACV valve there's no point in cleaning it, it'll just get dirty again

MikiVes

Hallo, I have Lexus LS 400, 91 y, after the engine starts smoking and I know that this is an error in the servo, but I do not know how to fix and what to look where he pulls the oil into the engine. Please help someone, it would be good photo or a plan where the leading hoses, sensors, etc. Thanks

AzHotLS

iTrader: (1)

@MikiVes, welcome to the club. I was in Praha about 5 years ago, it's a very beautiful city.

Anyway, this should help:

https://www.clublexus.com/forums/ls4...ystem-diy.html

Scroll down a little ways to the section starting with "Removal of ACV valve, and Plugging such valve with the ACV itself."

Good luck and let us know if you need more help.

MikiVes

Dear AzHotLS, I am pleased that you know my city, I live in a city of Prague .... thank you for your advice and I'll do it

AzHotLS

iTrader: (1)

I don't think they allow vehicles near the Clock Tower but it would be an awesome photo with your car in front of it.

cwbailey

Hello everyone. Have the same problem and will attempt to fix it this weelkend. Thanks for the help.