whats wrong with this setup?(pics included)

[rx7 FC TII]

i just tapped the acv block off plate for the boost gauge but im not getting any vacuum or boost off of it once the car is started. ignore the color and rtv coming out the side. i know its not leaking cause the car idles but when i pull the vac line off the car still idles and doesnt die so i know its not pulling vacuum.

http://i99.photobucket.com/albums/l282/rx7FCTII/8aa67180.jpg

[classicauto]

Probably not actually seeing vaccum. I'm not a fan of tappign that plate myself...I prefer a more "direct" method of eitehr tapping a runner or something of the like.

Could also be bunged up with RTV?

[Whizbang]

your much better off taking a tee off the MAP sensor line close to the manifold.

[85rx-7gsl-se]

your much better off taking a tee off the MAP sensor line close to the manifold.

x2

[djmtsu]

Yup, tee off the MAP signal. That is how most FC guys do it.

[fire85gslse]

Yup most people tee off the MAP signal, simple, easy, and it works.:driving:

[Flooder]

Where's the map sensor at? Are you talking about the line that the pressure sensor is connected to?

[FerociousP]

the map sensor is the pressure sensor

[Fidelity101]

Where's the map sensor at? Are you talking about the line that the pressure sensor is connected to?

passenger side of the engine bay (or driver side if you got a RHD car :D ) near the strut tower next to the AFM or MAF (depending if its s4 or s5) it has a vacuum line going to it and the top will say N3XX PRESSURE SENSOR, its black and is only 1"x3" black rectangle looking thing.

[rx7 FC TII]

well the problem for me with the map sensor is if i do that then i dont have enough pressure for my BOV to open.

i have heard now that on the UIM near the throttle body. the three nipples pointing towards the front of the car can be used for this and the middle one is the best.

so im going to experiment with a few things

[Whizbang]

well the problem for me with the map sensor is if i do that then i dont have enough pressure for my BOV to open.


have you done this personally, or just reiterating "hear say"

[djmtsu]

My BOV works fine and my signal is split to the sensor, BOV (Apexi) and the boost gauge.

[Flooder]

I was confused. Everything I've ever read has called that a "pressure sensor" on the TII's and a "boost sensor" on the NA's.

[85rx-7gsl-se]

My BOV works fine and my signal is split to the sensor, BOV (Apexi) and the boost gauge.

Exactly...I ran my Map sensor, fpr, bov, boost gauge, and water/meth sensor all off the same post with no problems.

[WE3RX7]

You can tap into the same line for BOV. It wont affect the devices at all. Vac exists whenever there is absence of pressure, if your connections are not TIGHT, then maybe it would affect the BOV from working as well. However, you should also have an adjustment on the BOV (if aftermarket) to firm it up if needed...

[RETed]

First of all, the position of the fitting is in the wrong place.
The original location of the fitting for the boost sensor is at the small bump in the upper left "corner" of the plate.
If you're not exactly in this position, you're not going to get any reference to the intake.

Second, you can use a T for the BOV, but the BOV *NEEDS* to be on the "straight" leg of the T.
You cannot put the BOV on the 90-degree leg - this does not allow for a strong enough vacuum signal to trigger the BOV.


-Ted

[rx7 FC TII]

ok i decided to try the T fitting again and yes before i did have it set up that way and i lost pressure to the bov...not just "here say"

i tightened everything with zipties and double checked everything and it is working fine now. i guess the last time i had it set up this way something was loose.

now to pull off the block off plate and weld it up.

[TehMonkay]

You could just drill and tap the plenum for like a 1/8" pipe thread and run a pipe thread to 1/8" barb fitting and run it off that.