Where Does This Hose Go?

[msmith]

Hi SAU,

Just purchased a 1996 GTS25T and after going over the engine i noticed this hose disconnected.

Any idea where it goes?

Also the idle sits at around 1500 rpm is this normal for a manual?

Thanks in advance.

[jjman]

down thru that bracket to where that other vacuum hose is going too. There should be 2 vacuum hose attachments just below there. this hose should plug into one of them.

yes 1500rpm is mad. See what it does after you fix your vacuum leaks n then other wise tweak your idle. If still no good then clean the AAC valve.

[89CAL]

That hose ends up going to the carbon canister, so if that has been removed it might explain why its been plugged.

From memory, it goes to the small diaphram part at the very top of the carbon canister (theres a smaller barb for this then the rest pretty sure)

as for the idle. What ECU are you running? still std?

If so, as above, clean the AAC valve and have a play with your idle. You need to have the car warm and unplug one of the plugs on the TPS. Because yours is a series 2 or 1.5 engine and has the newer TPS, I'm not sure which plug it is, but its probably alright if you unplug both of them. Then it should be running purely off your idle screw setting. Adjust the screw on the AAC until its sitting happy.

If you plug the TPS back in and it goes back to a higher then normal idle, then it looks like (from the R33 shop manual) that you have to play with the idle screw on the std ECU. I've never done this so not to sure what the procedure is. The book says something about putting it in "work support" mode, no idea how or what that is

[89CAL]

relevent screenshot:

[msmith]

Still standard ECU afaik, Will have a look at it.

Edited September 17, 2012 by msmith

[StevenCJR31]

relevent screenshot:

^^^this, it could be the idle screw is wound right out as i reckon that hose being blocked off wouldnt contribute to a high idle

[msmith]

I've poked around abit more and found out that the canister has been relocated to the driver wheel well. The throttle body vac line has been blocked, only leaving the plenum vac line to purge the canister. The fuel vent and air have been t joined and run to the canister and another line has been introduced that runs in metal pipe down the passenger side of the engine, along the top of the firewall and disappears below the brake booster.

What is this 4th line?

[msmith]

Unless the fuel vent line comes from under the brake booster (makes sense as the fuel pump is on the driver side). And the air vent comes from both the chassis at the front and also from a steel pipe near the exhaust manifold.

Is this correct?