whats wrong with this setup?(pics included)
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whats wrong with this setup?(pics included)
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.
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ok so should i install it into the smaller plate to the left? will that work?
ive always seen to install the nipple in this spot. is there a difference between an s4 and s5 for this install?
ive always seen to install the nipple in this spot. is there a difference between an s4 and s5 for this install?
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when i put a T fitting on the other line i dont get enough pull for the BOV.
when you talk about tapping a runner into it directly where do you mean?
does anybody have any pictures of the best place to put this?
when you talk about tapping a runner into it directly where do you mean?
does anybody have any pictures of the best place to put this?
Last edited by rx7 FC TII; 12-22-08 at 03:01 PM.
#7
Top Down, Boost Up
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Take the UIM off, drill a hole in an intake runner, thread it, screw in your threaded nipple and stick your line on it. Anywhere in the intake path will let you pull vacuum/boost.
The problem with tapping into an ACV blockoff plate is that you have to stick it in exactly the right place. The top nipple on the ACV gets connected to vacuum, so you can track down the small opening (on the LIM) that connects there and use it.
The problem with tapping into an ACV blockoff plate is that you have to stick it in exactly the right place. The top nipple on the ACV gets connected to vacuum, so you can track down the small opening (on the LIM) that connects there and use it.
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#9
Crash Auto?Fix Auto.
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As described after your post, I'm talking about directly tapping into the runner feeding the engine. Drilling a hole, tapping threads into it, and installing the barbed fitting. A good example of a spot is a JDM lower intake. You'll note that they pull vaccum for the brake booster off the rear secondary runner, at the very top of the LIM using a banjo bolt/etc. I'd use that same spot, you'll be able to stuff a rag far enough down the runner that you won't get shavings in the engine and won't have to pull the LIM.
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no i dont have the stock ecu or mop. all emissions are removed and throttle body mod done.
ok i see what your talking about now. im about to head over to a friends house to finish the work up and ill report back as to which way i choose to do.
^^ im gonna try that too since i dont have any lines there.
ok i see what your talking about now. im about to head over to a friends house to finish the work up and ill report back as to which way i choose to do.
^^ im gonna try that too since i dont have any lines there.
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any body have any pics of there install? id like to get an idea of a good area to put it in.
we didnt do it tonight.. we started drinking and decided to do it in the morning lol
we didnt do it tonight.. we started drinking and decided to do it in the morning lol
#14
Crash Auto?Fix Auto.
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If you use the nipples on the UIM near the throttle body - the forward facing ones as mentioned will provide negative and positive readings. The lower most niipple gives the clearest signal in my experience - I use that for my MAP sensor. The uppoer one being a little larger I use for the BOV. You could use the middle one for your gauge.
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ill check that out and see because i tried it last night and i couldnt get a reading off the top nipple. ill try the others in a few minutes.
also im wondering if this will work on mine because i have no lines running to those nipples and they arent capped off. just curious because if they do have positive and negative readings then shouldnt that be a source of a vac leak right now?
i feel really dumb because this is such an easy install but i need to do this the right way.
also im wondering if this will work on mine because i have no lines running to those nipples and they arent capped off. just curious because if they do have positive and negative readings then shouldnt that be a source of a vac leak right now?
i feel really dumb because this is such an easy install but i need to do this the right way.
#16
Top Down, Boost Up
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For the nipples on the back of the UIM, the top 2 should be vac/boost, while the larger bottom one is metered air only (for the oil injector bleeds normally). I know at least one of the back ones should work since it normally runs to the primary fuel injector bleeds.
If you still can't get a signal off of any of these nipples, make sure your throttlebody spacer isn't in backwards. Maybe it got flipped?
And YES, you should be capping unused nipples. You'll have all sorts of leaks with them wide open.
If you still can't get a signal off of any of these nipples, make sure your throttlebody spacer isn't in backwards. Maybe it got flipped?
And YES, you should be capping unused nipples. You'll have all sorts of leaks with them wide open.
Last edited by RotaryRocket88; 12-23-08 at 03:54 PM.
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If you tap the blockoff plate for the ACV, you have to tap in the right place and make sure the gasket isn't blocking the path of vacuum. There are three specific places you can tap and install a nipple. One is opposite where the original boost sensor nipple was. The next place is opposite where the anti after burn valve, internal to the ACV, is located. The third place would be there the anti after burn valve fed airpump air into the runner.
On the back of a series four USA car, there are four nipples one above the other. Only ONE is vacuum. That is the bottom one that feeds the double throttle diaphram thu the water thermo valve. The large one is for feeding AIR TO the oil injectors spider. The others feed AIR to the primary air bleed nipple inbetween the two oil injectors on the lower intake manifold. The last one is blocked off. It was originally meant for the SubZero assist valve that has been removed years ago.
The nipple that feed AIR, have a passage inside the throttle body that exits PRIOR to the throttle plates i.e. no vacuum on them.
On the back of a series four USA car, there are four nipples one above the other. Only ONE is vacuum. That is the bottom one that feeds the double throttle diaphram thu the water thermo valve. The large one is for feeding AIR TO the oil injectors spider. The others feed AIR to the primary air bleed nipple inbetween the two oil injectors on the lower intake manifold. The last one is blocked off. It was originally meant for the SubZero assist valve that has been removed years ago.
The nipple that feed AIR, have a passage inside the throttle body that exits PRIOR to the throttle plates i.e. no vacuum on them.
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