I have an 89 xj and just finished my header swap on the intake near the steering is this thermostat looking thing (that i have no clue what it is) is and it has 2 vacum ports on it I took the stock air cleaner box out and put a cone filter on it and did away. With what I needed 2 my question is do I need to hook this thing up somewhere or can I just plug it off and go with it its strictly off road vehicle will post pic of mysteruous part thanks for looking

 

That would be your Fuel Pressure Regulator....yes you need it.

 

I don't think its the fuel pressure regulator this part is bolted to the intake inbetween the top and bottom on the side where the steering shaft is it had some type of plastic round thing with vaccum lines hooked up to it I actually think its one of the lines from the stock air cleaner box and the other I don't know the fuel pressure regulator is on the fuel rail with the injectors correct

 

Pics would really help.....

 

think you are looking at the egr it opens to let ex in the intake for some dumb reason make sure its closed and forget about it some emission crap

 

K I will post pics when I get a chance

 

I thought it might be some kind of emisson crap cause I have a ho head and intake laying around and it dosent have that thing on it

 

 

Here's a pic its some kind of emission bs pluged it off cranked her up and sounds bad ^$$ here's a pic

 

EGR Valve

 

i have an 88" xj and the intake I bought used the stock rubber elbow, at first I thought u were talking about that pointless tube that ran from the front of the stock air box to the bottom side of the engine