i just put my engine back together, but there is a couple of things im haveing trouble with..

#1. where does the boost senser hook up to?

#2. on the intake manifold, on the left side(closest to the firewall), there are to 2 lil vaccum line hook ups, what hooks up there?



and i have a s4 NA



plz help

the boost sensor hooks up to one of those open nipples. the sensor mounts on the shock tower



mike

I'm almost positive the boost sensor line connects to the nipple right in the middle of the UIM and right above where it connects to the LIM (nipple is basically in front of sub zero fluid line).. I capped the ones on the back side of UIM when I took out the rats nest.. need to find the vacuum line/emissions diagram. Do you have a FSM or Haynes manual laying around? There is a diagram in the fuel/emissions section that will tell you.

the LIM? are u sure? becuase i thought jus the subzero tank jus connected to that, plus if u look in the manual u can see it heads towards the side of the inake manifold(the vaccum line from boostsenser)

what open nipples? lol i think theres more than 1 open nipple. i think it is one of the two on the side of the intake manifold closet to the firewall, or that one nipple above the LIM, i cant figure out where it connects



some1 with a NA s4 post a pic of the intake manifold

I'm not sure of anything https://www.nopistons.com/forums/pub...#>/biggrin.png I'm at work and just going off of memory... I know there is one nipple either at the bottom of the UIM (like I said near the sub zero "plate") or at the top of the LIM in the middle.



I only have three vacuum lines connected and I'm trying to remember... sorry my brain is **** today.

I forgot I had a pic of my engine in the member's rides thread..



I have it hooked to like I said, the nipple that is either in the middle of the LIM or UIM and right near the junction of the two.

can u get that pic?

The pic is in the Member's Rides thread in this forum.. you cant tell by the pic. Here is some info from another post from Pengaru... this is how I hooked mine up and it works fine:



On NA there is a line going from the LIM between the primary injectors, up to the dynamic chamber, you keep this as it is supposed to improve fuel atomization at low rpms. You run your FPR straight to the back of the dynamic chamber, by the BACV and AWS solenoid theres a nipple. Then you take the boost sensor and run it directly to the UIM, near the junction between the UIM and LIM... it's right in the center on the side facing the passenger side of the engine bay.

what open nipples? lol i think theres more than 1 open nipple. i think it is one of the two on the side of the intake manifold closet to the firewall, or that one nipple above the LIM, i cant figure out where it connects



some1 with a NA s4 post a pic of the intake manifold [/quote]

make sure you plug all the other open nipples, other wise its gonna flood and do all that other good stuff, that people blame on the ecu



mike