What did this used to be?

[robertwsimpson]

On the intake tube I guess on the older vehicles, there are 4 ports. My 17 only has 3. Anyone know what the 4th is for? I have a 17, GT, 6MT... can't think of any other details that would matter.

Now I have 2 holes to plug.

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[robertwsimpson]

The three I know about are the head breathers and the sound tube.

 

[BmacIL]

1 & 2: PCV
3: Brake booster vacuum
4: Sound tube

They must've combined 1 & 2 or 1/2 & 3.

 

[robertwsimpson]

Ah I will check where that goes now. Thanks!

 

[robertwsimpson]

ok, follow-up question: what would you cap that with? I know there are kits for the sound tube delete, but I'm not quite sure what to do with capping this port for the brake booster line which I don't have. (in my car, it appears to go into the intake manifold???)

 

[stoli]

ok, follow-up question: what would you cap that with? I know there are kits for the sound tube delete, but I'm not quite sure what to do with capping this port for the brake booster line which I don't have. (in my car, it appears to go into the intake manifold???)

In a pinch, duct tape and a zip tie until you can find a cap that will fit.

 

[robertwsimpson]

In a pinch, duct tape and a zip tie until you can find a cap that will fit.

Well, I haven't installed the new intake, and I had thought of the duct tape method... I believe every car should have duct tape and tie wire on it somewhere!

 

[GTBOB]

I just looked at my stock, '15 intake tube and compared it to your '17. Your missing port is a vacuum line that operates the IMRC on mine.

 

[Terminator2]

I just looked at my stock, '15 intake tube and compared it to your '17. Your missing port is a vacuum line that operates the IMRC on mine.

I wonder if they got rid of the IMRCs on the 17 or just rerouted the line?

 

[robertwsimpson]

What is IMRC? It doesn't go to the brake booster?

 

[robertwsimpson]

Wait, this can't be a vac line. It's on the wrong side of the throttle body, right? It's just a breather.

 

[GTBOB]

Part #9E498 is the vacuum line that is on a '15 intake that snakes under the driver's side intake runner. It goes to the intake tube all the way back to the IMRC located on the passenger rear of the intake manifold.

 

[GTBOB]

I drew a red line to show how mine is routed under the runners:

 

[xXANCHORMONXx]

Go to an auto parts store or Amazon and look for vacuum caps.

You'll want a silicone one, not rubber

 

[robertwsimpson]

What am I missing here... How do you draw a vacuum upstream of the throttle plate?

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