LS - 1st and 2nd Gen (1990-2000) Discussion topics related to the 1990 - 2000 Lexus LS400

Need help with throttle body vacuum hose

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Old 04-04-12, 01:30 PM
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SpencerT
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Default Need help with throttle body vacuum hose

A mechanic from the previous owner had boken this, then glued it in place.

Now after doing my valve cover gaskets, sparkplugs and wires, this has me stumped.

I cannot get it to stay in place with fipg and epoxy.
What is this hose for?
can I run the vehicle without it attached?

How is it supposed to attach?

I NEED my car tomorrow morning. what can I do






Old 04-04-12, 04:53 PM
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SpencerT
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I found this
https://www.clublexus.com/forums/ls4...rams-pics.html

thank you billy powell for those pictures (and the parts I just bought from you)
The first picture in that link shows me what I want but it just isnt clear enough for me to see how it attaches.

I think some of the inner metal tube from the hose broke off in that plastic piece right before the throttle body.
I forget what its called.

but any Idea how to fix this correctly?
possible a two sided male hose connector?

what does that hose do?
can I atleast start my car with it disconnected?
Old 04-04-12, 05:01 PM
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SpencerT
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the hose in question attaches to the air intake pipe.

Every picture I can find besides billyd's only have one hose connection at that spot.

where I have an extra. that is now broken,
Old 04-04-12, 06:23 PM
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SpencerT
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haha thanks for the help guys.
To answer my own question.
http://us.lexusownersclub.com/forums...howtopic=31111

a hollowbrass fitting threaded into the broken hole on the air intake connector pipe.
then a new hose from that to the old hose.

still dont know what this is for and if its drivable as is...
Old 04-05-12, 12:10 AM
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PK_Celsior
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Originally Posted by SpencerT
haha thanks for the help guys.
To answer my own question.
http://us.lexusownersclub.com/forums...howtopic=31111

a hollowbrass fitting threaded into the broken hole on the air intake connector pipe.
then a new hose from that to the old hose.

still dont know what this is for and if its drivable as is...
i have your answer!!!! you can probably drive with it broken for a little time, but probably recommend replacing your whole air intake assembly. i would google car-parts or search your local junkyard. i believe the unit its connected to helps to control your idle from your power steering pump and adjusts accordingly
Old 04-05-12, 07:59 PM
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BobN54
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The power steering idle up is really not necessary. You can take the whole thing out, block it off, and never notice the difference. It functions only when the PS is turned to either R or L lock with the engine at of near idle. It slightly increases idle speed.
Old 04-06-12, 06:40 AM
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billydpowe
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Hay Spencer, I leave for a day and you get in trouble.. (smile) .
yes you can drive it with it broke, as bob said it is just for the idle up valve (ps) and is only activated when you are idling, going lock to lock purging your system to remove air.
I think my car has the california vacuum system (2ports) and most cars only one. your first photo at the bottom shows 50200 CAL that could mean california... any way dont worry about it, plug it up or glue, rethread it, whatever.. your good to go.
Old 04-10-12, 06:51 PM
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SpencerT
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Thanks everybody. I fixed this a few days ago and am finally posting my fix.

I bought a 1/4 inch barb splice fitting.
Drilled out the hole on the intake pipe with larger and larger bits.
Put a little fipg in the hole then wedged the barb fitting in place.
When it dried I put a new piece of 3/16" fuel hose from the barb fitting to the metal inner hose of the hose that had proken off. a few hose clamps and it was good to go.


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