PAIR system & Exhaust componentry

Post by **wannawangan** » Thu Jun 15, 2006 10:06 pm

PAIR System

Looking at my engine bay today, I realize that the components that make up the PAIR system will serve as an obstacle when I decide to go do a test fit or installation of my turbo manifold.

Can I eliminate this system to free up some space to accomodate the turbo manifold and related components? What would I have to reroute or cap off?

FYI, the PAIR system consists of the PAIR valve and the PAIRC solenoid valve (see page 117 in the Nissan FSM for a description of the assemblies). It is that small, black box attached to the driver's side strut tower (see page 107 in the Nissan FSM for an illustration of each component's location).

Post by **wannawangan** » Thu Jun 15, 2006 10:12 pm

EGR Tube

The EGR tube is connected to the stock exhaust manifold and is routed to the IACV assemblies (page 107 in the Nissan FSM for a clearer illustration of component locations).

Can this be eliminated or rerouted?

Post by **wannawangan** » Thu Jun 15, 2006 10:22 pm

To get the information and illustrations I've described, please download your own copy of the FSM from here:

http://www.zeroyon.com/index/content/view/24/47/

Thanks be given to the site admin for placing this up! This is a benefit for many who cannot afford a hard copy (like me!).

Post by **lrb_2000** » Fri Jun 16, 2006 3:24 am

wannawangan wrote:To get the information and illustrations I've described, please download your own copy of the FSM from here:

http://www.zeroyon.com/index/content/view/24/47/

Thanks be given to the site admin for placing this up! This is a benefit for many who cannot afford a hard copy (like me!).

Really, you can get rid of both the EGR and PAIR system. I have niether on my car, and it's fine. Plus, usually neither are used in a turbo setup.

Post by **wannawangan** » Fri Jun 16, 2006 2:45 pm

I can take the system out without problems (knock on wood) but I want to make sure that lines that have to be routed are routed properly and the other things that can be capped off are properly capped off and so on and so forth. As far as I know, the PAIR system is supposed to provide addtional air into the intake manifold from the intake filter box. I think this system was only on California 240sx's and not Federal models.

Post by **wannawangan** » Sat Jun 17, 2006 4:04 pm

This is the PAIR valve.

Post by **wannawangan** » Sat Jun 17, 2006 4:05 pm

And this is the PAIR Solenoid (PAIRC) Valve.

Post by **wannawangan** » Sat Jun 17, 2006 4:07 pm

Here is what I have to work around. Keep in mind that it is easy to say "just take it out" but to do so blindly is only going to hinder progress.

Post by **wannawangan** » Sat Jun 17, 2006 4:08 pm

And another view...

Post by **KATwo40** » Sat Jun 17, 2006 4:20 pm

The PAIR system routes fresh air into the exhaust to assist the catalyst.

It's really not a big deal, man. Remove the hunk of crap on the strut tower. Remove the exhaust fitting from the end of the pipe that goes to the downpipe. Stick a nickel in the hole on the downpipe, then screw the fitting in on top of it.

Cap off the other vacuum lines and be done with it. Cap off the big hole in the air intake box. Problem solved.

Also, these were on ALL USDM models, not just CA.

FWIW, some of the old Hyundai cars had this system in the form of a reed valve that would fail and allow super hot exhaust into the engine airbox, resulting in an engine compartment fire. It was a big problem in the early 90's on the cars.

Post by **Florida240sx** » Sun Jun 18, 2006 4:52 am

My car and my friends car have it removed. I just started yanking on it lol.

Post by **j-z** » Sun Jun 18, 2006 8:46 am

must be a s13 thing, as my nor any other s14 ive seen has this. just take it all off totally and youll be good.

Post by **wannawangan** » Sun Jun 18, 2006 2:22 pm

j-z wrote:must be a s13 thing, as my nor any other s14 ive seen has this. just take it all off totally and youll be good.

I will. But I will not just do it without first planning where to route and cap some of the lines.

Post by **lrb_2000** » Tue Jun 20, 2006 6:12 am

there's like two vacuum lines, and the hole in the exhaust.. I just capped off the lines, and did the nickel trick in the exhaust.. i'll go get some pics,

here you go... i cut the end off the tube that goes to the exahust, put a nickel in the hole, and screwed back in.. no exhaust leak, and it's been over a year.

as far as the vacuum lines, i traced them back to the throttlebody area, cut took one off competely at the plastic T fitting, and cut the other other one short, and routed it back.. so it does a complete circle bascially.. hope that makes sense haha..

Modified by lrb_2000 at 9:24 AM 6/20/2006

Post by **wannawangan** » Tue Jun 20, 2006 5:19 pm

Thanks for providing the pics and procedures. I will try this out on my own and see if I can produce a comprehensive write up on this with pics as well.

Your input is much appreciated!

Post by **superDorifto** » Tue Jun 20, 2006 10:42 pm

dude, seriously...there are two lines to cap and the egr valve to block off. its not that hard...dont know if it warrants a full write up. taking it off in no way affects reliability or drivability. just unbolt the crap and be done with it.

Post by **wannawangan** » Thu Jun 22, 2006 7:59 pm

superDorifto wrote:dude, seriously...there are two lines to cap and the egr valve to block off. its not that hard...dont know if it warrants a full write up. taking it off in no way affects reliability or drivability. just unbolt the crap and be done with it.

Here are a couple of reasons as to why I believe it "warrants a full write up." I am doing this purely for our fellow NICO members and the occasional guest/newbie who traverses our site. This will provide a reference for those who have to deal with this particular situation. I am also doing this as a potential tech write up so that maybe someone (like myself) can develop a system that allows for proper cap off for aftermarket upgrades and reinstallation when it's time to do a smog inspection (i.e. visual test). Whether you agree with me or not doen't matter to me. Consider me doing this for myself and for those who have a capacity to appreciate this information.

Post by **superDorifto** » Sat Jun 24, 2006 9:57 am

im not saying it is not nessecary, nor am i saying it is not worthwhile for the occasional browser to have everything spelled out for them. my point of veiw is that youre making a mountain out of a molehill. the vacuum diagram in the fsm is pretty straight foward, and anyone that spends five minute searching could find all the info they need concerning the removal of the PAIR and blocking of the EGR. i feel that the only people your thread will help are exactly the type of members that need to be searching in the first place. i will make a suggestion tho, if you do produce a full right up, include a pic of the vacuum diagram from the fsm with anotations EXPLAINING why youre doing what youre doing. mabye then a potential noob will learn instead of just blindly copying what you have obviously put a lot of thought into...just my two cents.

PAIR system & Exhaust componentry

PAIR system & Exhaust componentry

What should I do about the EGR tube?

Get your copy of the Nissan FSM

Re: Get your copy of the Nissan FSM (wannawangan)

Okay... how?

Here are some pics to clarify what I am talking about...

Re: Here are some pics to clarify what I am talking about... (wannawangan)

My engine bay... pardon the dust...

Re: My engine bay... pardon the dust... (wannawangan)

Re: (Florida240sx)

Re: (j-z)

Re: (lrb_2000)

Re: (wannawangan)

Re: (superDorifto)

Re: (wannawangan)

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