3S-GE Question

[Darkhound]

Hey guys... I know im not on here much but I hope you can help me with my question... Recently my car engine was playing up. Took it to the mechanics and they said the engine had basically died and the car needed a new one. SOOOOO long story short We bought a new one and put it in the car and all and we have a dillema.

Off the TVIS there are a number of thin tubes. To my understanding they are as follows;

#*
#0
#1
#2
#3
#4

#* and #0 trail off down the back of the engine bay and 1, 3 and 4 dissapear off elsewhere but inspecting closer.. we cannot find the place to plug the #2 tube in!

We tested the car WITHOUT the cable plugged in and the engine ran fine (considering we hadnt tuned it and the fluids had not all had a chance to run through etc).

Dad came up with the idea that maybe the tube was some kind of vaccume or overflow tube and to me that makes sense, but if its coming from the TVIS it would only overflow petrol and this would be a problem.. and the vacuume theory isnt really possible is it coz of the large air intake already going into it?

Any Ideas on where this cable goes and stuff?

The car is a:

1986 ST162 SX 2.0L 3S-GE Toyota Celica

Thanks

[Vios-GT_07]

pics ?

(sorry i can't imagine anything today.. have a migrane and shit loads of study)

[Jorrs]

wow you really need to better explain yourself..
i dunno where this petrol is coming into it, your talking about the TVIS and the inlet manifold ?
im assuming its just a vaccum hose that isnt connected somewhere, try blocking it of and see if the revs change.
goodnight

[Dale]

Overflow petrol?
At the most I think you'll have a vacuum leak and the car will stall at idle, or tvis won't kick in and you'll have a vacuum leak above 3000rpm (or whereever tvis kicks in)

[doobs]

Overflow petrol?
At the most I think you'll have a vacuum leak and the car will stall at idle, or tvis won't kick in and you'll have a vacuum leak above 3000rpm (or whereever tvis kicks in)

Exactly my thoughts, with out any pictures Id only be guessing...

sorry mate

[Jorrs]

i think hes a bit confused.. the TVIS does not ahve petrol in it, its inlet manifold ( think air) also theres SO many shitty lil vacuum hoses at the back of the thing that no one can help without a pic of the bugger

[urantia]

You need to get ahold of the vac diagram, usually they are attached under the bonnet, You will get all sorts of wierd behaviour if they are plumbed into the wrong places.

1 goes to the charcoal cannister, a few go on those VSV's plumbed into the water t-junction pipe, a few go to the throttle body, a few go on that ufo shaped diaphram which controls the EGR.

And the TVIS has a couple vac hoses down the back of the block. So perhaps 1 of those area's will reveal where you need to plug that last vac hose.

[medwin46]

Hey guys... I know im not on here much but I hope you can help me with my question... Recently my car engine was playing up. Took it to the mechanics and they said the engine had basically died and the car needed a new one. SOOOOO long story short We bought a new one and put it in the car and all and we have a dillema.

Off the TVIS there are a number of thin tubes. To my understanding they are as follows;

#*
#0
#1
#2
#3
#4

#* and #0 trail off down the back of the engine bay and 1, 3 and 4 dissapear off elsewhere but inspecting closer.. we cannot find the place to plug the #2 tube in!

We tested the car WITHOUT the cable plugged in and the engine ran fine (considering we hadnt tuned it and the fluids had not all had a chance to run through etc).

Dad came up with the idea that maybe the tube was some kind of vaccume or overflow tube and to me that makes sense, but if its coming from the TVIS it would only overflow petrol and this would be a problem.. and the vacuume theory isnt really possible is it coz of the large air intake already going into it?

Any Ideas on where this cable goes and stuff?

The car is a:

1986 ST162 SX 2.0L 3S-GE Toyota Celica

Thanks

My '89 ST162 has a diagram of the TVIS vacuum hose setup on the underside of the bonnet. (Look up when the hood's popped!)

Try there, come back to me if you are still stuck i'll get a photo of the diagram!

[warrior]

here is a pic of the vacuum diagram




hope that helps

Karl

[Andrew162]

I tried sourcing pics of Lime89's head and attached accessories last night, but his ISP went down and took all his pics with it. one of those photos in particular would have given definitive proof of what-went-where and maybe a clue to solving this little puzzle.

I had a look through the Haynes manual and found out just how limited the information on vacuum-related stuff is. There's not even a section that describes TVIS, actually it doesn't say ANYTHING about TVIS at all!! When I changed over the vacuum tubes for silicon, I did notice that some of these tubes had imprints on them. Don't know if they were numbers, but I pretty much changed over all "accessible" vacuum hoses for silicon.

As said before, we need pics to get a more accurate picture of what's going on and where, but it's unlikely that fuel would be involved. TVIS only handles vacuum above a certain RPM (around 4000 - 4300rpm depending on which country you're in) and opens up a secondary butterfly in the inlet manifold to allow more oxygen to come in with the fuel demand, effectively making the car run leaner in that RPM range. The only tube that has anything to do with fuel would be the charcoal canister which catches fuel vapours both when the car is running and when it's off (that annoying ticking sound that happens every few minutes when you're working on your car).

Cheers.

edit #1: do you know what size this hose is, eg. 4mm or 6mm? that would also help.

edit #2: on further research into the Haynes manual, I found that the "designation marks" #1, #2, etc. and the hoses that they go to on a 1987 - 1989 3S-FE model engine instead. #2 goes from the EGR vacuum modulator (2 hoses in, 1 hose out, one larger hose underneath) and leads around to the front of BVSV (EGR, I think it's the black-coloured one). Do you know which engine you got to replace your stuffed one?

Hope that helps.