i just noticed that my j-pipe doesn't have the nipple on it in the middle.... what is that for and why do some have it and some not?

 

a plastic piece sets on the nipple and holds the lead in place that runs from the coil to the distributor.

I thought all of them had it. Yours may have been removed by a previous owner.

 

no mine NEVER had anything on the j-pipe... and it's the big 1/2" pipe nipple in the middle that has a hose on it and goes to 3 others. i am only the 3rd owner and i know the last 2 so for sure NO.

 

Es de uh.... maybe you should post a pic of this nipple.

 

i just took this off another post... it's at the bottom of the picture on the j-pipe and has a hose comming off of it. https://www.zdriver.com/forums/280zx-s130-forums-77/air-fuel-issues-24739/

 

This??? (see yellow arrow)

It's for the air regulator / AAC. If you don't have it, you've prolly got idle probs.

 

yes that... my car does NOT have nor EVER had that. but i DO have an AAC valve and i do NOT have idle problems. i'm just curious cause i got another j-pipe off ebay and it has that nipple.

 

Post a pic of your engine bay...

 

duh.. i'm retarded!! i guess i've always looked past that... i've NEVER noticed that on mine before and i was work'n on it tonight! lol sorry

 

And that's the end of that chapter.

PS... clean engine bay!

 

lol figured that! thanks i try to keep it super clean... thats why the tb swap the greddy pop-off valve... the turbo timer. the extra gauges. i just like to add to the already ZWEETNESS that is the ZXT!! so if i get rid of the AAC setup with the Z31 ecu i can remove all that?

 

All of that? Like the AAC and EGR...

 

the AAC and the 4 bigger hoses that go to the j-pipe.. the tb... can remove the EGR?

 

It's all been covered in the Z31T ecu upgrade threads. And you can't get rid of all of those hoses because you still need the j-pipe to connect to the air regulator.

 

not if i remove it right?

 

Uh... do you know what it does? Can I remove the crank on my motor cuz I don't want it?

 

i was talk'n about the AAC... i thought alot of people have been removing them? i'm confused lol

 

You can remove the AAC (might have idle probs after) but that 4 way (really a 5 way) hose splitter connects the J-pipe to air regulator, so you'll need to keep a line between them.

 

what exactly does the AAC valve do anyways?

 

AAC = Auxiliary Air Control. It controls idle.

 

gotcha! thanks

 

If you remove all of that, at least leave the air regulator and just run hose from the J-pipe to the air regulator.