Boost Senser
07-28-2003, 10:31 AM
#1
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Join Date: Jul 2003
Location: ct
Posts: 112
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
#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
07-28-2003, 11:08 AM
#3
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Join Date: Aug 2002
Location: Eastern PA
Posts: 1,801
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.
07-28-2003, 11:14 AM
#4
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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)
07-28-2003, 11:17 AM
#5
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Originally Posted by j9fd3s' date='Jul 28 2003, 08:05 AM
the boost sensor hooks up to one of those open nipples. the sensor mounts on the shock tower
mike
mike
some1 with a NA s4 post a pic of the intake manifold
07-28-2003, 11:19 AM
#6
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I'm not sure of anything 
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 only have three vacuum lines connected and I'm trying to remember... sorry my brain is **** today.
07-28-2003, 11:55 AM
#9
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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.
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.
07-28-2003, 12:02 PM
#10
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Originally Posted by rx7raca' date='Jul 28 2003, 08:17 AM
[quote name='j9fd3s' date='Jul 28 2003, 08:05 AM'] the boost sensor hooks up to one of those open nipples. the sensor mounts on the shock tower
mike
mike
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