Air Suction dilemma

thebigbread · Post by **thebigbread** » Fri Jul 20, 2007 4:36 pm

ok, my battery was dead, so i took it out & i noticed this:

is this supposed to be like this? ive never noticed it before, its right under the starter.

while i was at it, i also saw this:

this is on the passenger's side firewall.

im not sure where it goes either.

keith · Post by **keith** » Fri Jul 20, 2007 6:16 pm

Its supposed to point straight down so that water that condenses on your evaporator drains out onto the ground, not on the passenger side floorboard.

thebigbread · Post by **thebigbread** » Fri Jul 20, 2007 9:05 pm

oh, so its supposed to be disconnected

that bottom pic is actually sideways, so it is actually pointing down.

I dont think the hose in the top pic hooks up to anything, according to the FSM its the "air suction".

Post by **ARCHINSTL** » Fri Jul 20, 2007 11:17 pm

Here is some info on the air suction tube:
https://tercel4wd.com/forums/viewtopic.php?t=12 ... on&start=0
You are just missing the metal L-shaped tube which attached to the block and the rubber hose in your pix. As detailed in the link,
I removed mine as it was quite kinked and used a really stiff washing-machine hose. I still have not replaced it with another metal
pipe - don't intend to, either.
Tom M.

keith · Post by **keith** » Sat Jul 21, 2007 7:59 am

We have the CA model so I didn't recognize the first pic, did the second one though.

Post by **Petros** » Sun Jul 22, 2007 10:46 pm

This is just an air inlet to a reed type valve chamber that eventually leads to the catalytic converter. It lets freash air into the cat. The idea is to use the exhuast pulses to introduce oxygen into the cat converter to complete oxidation of the the NOx and CO (into N2, H20 and CO2), in earlier cars they actually used a belt driven air pump, this is better.

There appears to be a missing length of metal tube that goes ahead of this rubber connector hose (it bolts to the side of the block). It simply ends under the alternator, presumably high and forward enough so mud and water splash will not enter the intake tube. It makes little difference if the inlet tube is missing or not except for the water/mud splash issue. Even with the metal inlet tube, it still looks out of place to have an open ended tube just sitting there beside the engine. No worries unless you regularly cross creeks or flood zones with your Terc.