What are these tubes meant for? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

CrimsonSx · 07-10-2020, 10:20 PM

I was setting up a cold air intake for my 1995 240sx, and I noticed the intake has spots for two tube connections. There are three going into the engine. I know the one going to the top of the engine is essential and I have a spot for the small tube.What's the other one for???

Silv1401 · 07-10-2020, 11:52 PM

Assuming you're talking about a KA, the tube to the side of the throttle body goes to the IACV, and I believe the evap purge valve if memory serves correct.

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CrimsonSx · 07-11-2020, 04:55 AM

So there really is nothing that I can plug to get this CAI work?

zombiewolf513 · 07-11-2020, 07:22 AM

One goes to the valve cover, one goes to IACV, one goes to EGR solenoid, one goes to the egr solenoid/pairc valve/scv

Silv1401 · 07-11-2020, 09:19 AM

Not always recommended for n/a but you can pull the tube off of the valve cover, and just run a small filter there. There has been much debate over whether the PCV system in these engines is even effective. But I'll let you do your own research on that topic, as it has been covered numerous times. If it were up to me, that's what I would do. Or just get a different intake? CAIs don't really do anything anyways, besides add some bling value.

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zombiewolf513 · 07-11-2020, 12:00 PM

The one going to the valve cover is for maintaining ventilation to the head and the pcv maintains ventilation to the block. You need both. Running without it is asking for blown oil seals and other oil flow issues. If you dont have EGR, plug the EGR ports on the CAI, you need iacv and valve cover ventilation connected.

CrimsonSx · 07-11-2020, 01:37 PM

Alright thanks. I think I'm just gonna go ahead and get an MAF adapter and call it a day since I already got a new filter. Getting a refund and going the safe route seems like the best thing since I dont have the expertise to have this thing work for me.

S14rebuild · 07-12-2020, 04:21 PM

Is it really that difficult to install a cold air intake on a 1995 car in 2020? So hard ur infacr giving up on the idea?...oh god

CrimsonSx · 07-13-2020, 09:07 PM

It's it's more that I picked up an intake that has a missing fixture and since this is my first car ever, I'd rather not just start pulling things off or plugging things. I'll just buy another intake down the road a bit so I don't fuck up...oh god.

Silv1401 · 07-14-2020, 12:22 AM

Lol welcome to zilvia by the way. We're salty here.

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CrimsonSx · 07-14-2020, 02:08 AM

Help with a little bit of salt is worth the info lol.

07-10-2020, 10:20 PM	#1
CrimsonSx Join Date: Jul 2020 Location: Raleigh Posts: 5 Trader Rating: (0) Feedback Score: 0 reviews	What are these tubes meant for? I was setting up a cold air intake for my 1995 240sx, and I noticed the intake has spots for two tube connections. There are three going into the engine. I know the one going to the top of the engine is essential and I have a spot for the small tube.What's the other one for???

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07-10-2020, 11:52 PM	#2
Silv1401 Zilvia Member Join Date: Jan 2019 Location: Vancouver, WA/Portland, OR, USA Posts: 166 Trader Rating: (1) Feedback Score: 1 reviews	Assuming you're talking about a KA, the tube to the side of the throttle body goes to the IACV, and I believe the evap purge valve if memory serves correct. Sent from my SM-G950U using Tapatalk

07-11-2020, 04:55 AM	#3
CrimsonSx Join Date: Jul 2020 Location: Raleigh Posts: 5 Trader Rating: (0) Feedback Score: 0 reviews	So there really is nothing that I can plug to get this CAI work?

07-11-2020, 07:22 AM	#4
zombiewolf513 BANNED Join Date: Mar 2011 Location: AZ Age: 33 Posts: 1,682 Trader Rating: (6) Rides Gallery: zombiewolf513 Feedback Score: 6 reviews	One goes to the valve cover, one goes to IACV, one goes to EGR solenoid, one goes to the egr solenoid/pairc valve/scv

07-11-2020, 09:19 AM	#5
Silv1401 Zilvia Member Join Date: Jan 2019 Location: Vancouver, WA/Portland, OR, USA Posts: 166 Trader Rating: (1) Feedback Score: 1 reviews	Not always recommended for n/a but you can pull the tube off of the valve cover, and just run a small filter there. There has been much debate over whether the PCV system in these engines is even effective. But I'll let you do your own research on that topic, as it has been covered numerous times. If it were up to me, that's what I would do. Or just get a different intake? CAIs don't really do anything anyways, besides add some bling value. Sent from my SM-G950U using Tapatalk

07-11-2020, 12:00 PM	#6
zombiewolf513 BANNED Join Date: Mar 2011 Location: AZ Age: 33 Posts: 1,682 Trader Rating: (6) Rides Gallery: zombiewolf513 Feedback Score: 6 reviews	The one going to the valve cover is for maintaining ventilation to the head and the pcv maintains ventilation to the block. You need both. Running without it is asking for blown oil seals and other oil flow issues. If you dont have EGR, plug the EGR ports on the CAI, you need iacv and valve cover ventilation connected.

07-11-2020, 01:37 PM	#7
CrimsonSx Join Date: Jul 2020 Location: Raleigh Posts: 5 Trader Rating: (0) Feedback Score: 0 reviews	Alright thanks. I think I'm just gonna go ahead and get an MAF adapter and call it a day since I already got a new filter. Getting a refund and going the safe route seems like the best thing since I dont have the expertise to have this thing work for me.

07-12-2020, 04:21 PM	#8
S14rebuild BANNED Join Date: May 2019 Location: Florida-FAIL Posts: 2,497 Trader Rating: (8) Feedback Score: 8 reviews	Is it really that difficult to install a cold air intake on a 1995 car in 2020? So hard ur infacr giving up on the idea?...oh god

07-13-2020, 09:07 PM	#9
CrimsonSx Join Date: Jul 2020 Location: Raleigh Posts: 5 Trader Rating: (0) Feedback Score: 0 reviews	It's it's more that I picked up an intake that has a missing fixture and since this is my first car ever, I'd rather not just start pulling things off or plugging things. I'll just buy another intake down the road a bit so I don't fuck up...oh god.

07-14-2020, 12:22 AM	#10
Silv1401 Zilvia Member Join Date: Jan 2019 Location: Vancouver, WA/Portland, OR, USA Posts: 166 Trader Rating: (1) Feedback Score: 1 reviews	Lol welcome to zilvia by the way. We're salty here. Sent from my SM-G950U using Tapatalk

07-14-2020, 02:08 AM	#11
CrimsonSx Join Date: Jul 2020 Location: Raleigh Posts: 5 Trader Rating: (0) Feedback Score: 0 reviews	Help with a little bit of salt is worth the info lol.