Atmospheric blow-off on FC?

[soldave]

Dumb question but you are also blocking the vacuum line going to the BOV, right?

[jimmydanny]

Well, I still have the valve on the manifold side, but not on the air filter side. So I still use the vacuum line on the bov.

[Brett]

Have a look in the technical section in the top of this part of the forum... I did a blow by blow account of BOV removal, along with pics. It\'s possible you have spot one of the smaller hoses coming from the turbo to intercooler pipe... Take a look at the pics and you will see which one I mean. :wave

[jimmydanny]

Same as I did. put it in (original T-piece in plastic, not metal like you got) the T-piece, then plug the air intake side so I don\'t get unmetered air.

The car still dies when I start it, unless I keep it @ 2000 rpm

[Brett]

Sounds like an airleak to me... You need to double and triple check every joint!

:wave

[jimmydanny]

There can\'t be any. The IC side is okay, as it starts when I got the filter side plugged in (on the valve). And also, it must be a pretty nasty leak when it can\'t idle at all?

[Brett]

Can you take some pictures of how it looks?

[jimmydanny]

Yeah sure I thought I should do it. I only got camera flash as light tho, as the car is sitting outside with no proper lighting (flashlight is the only thing I got when working on the car )

[jimmydanny]

The blue ring is the valve on the IC side. It is connected. The yellow is the vacuum, it is connected.

The red is the air filter/turbo side. It is disconnected, and you can see a screwdriver is used to plug the hole, and it is 100% air tight.

Still, the car wont idle when it is disconnected here.

But when I connect the airfilter/turbo side of the valve again, it starts and idles as it should.

[TiddlesRX7]

maybe the car is sucking air in through the bov? if the valve is knackered that is.

[jimmydanny]

Well if it is, how can the ECU and AFM accept that? They shouldnt. And if it really does, it is still AFTER the AFM, which means it doesnt matter where it gets the air, it will come, thru the turbo, or thru the valve.

So I think that can\'t be it.

[TiddlesRX7]

No thinking about it it couldn\'t be. It\'d still be sucking the air from the airbox if it was. It\'s got to be drawing air in from somewhere though or it would idle. Im running a HKS BOV on mine that vents to atmosphere and have had no bother with it at all.

[jimmydanny]

This is, what Einstein would call, impossible. Anyone got an answer to this?

[Brett]

That\'s what I\'m wondering...

If you really must run without the BOV, then remove it completely and block both openings.

You must ensure when sealing the holes, your seal is airtight - it doesn\'t take much of a leak to kill the idle.

[jimmydanny]

I tried with a flurescent lamp starter (perfectly cylindrical) to block the hole as well, clamped it really hard.

So where that leak is coming from, I have no idea.

The fun thing is, I started the car without tightening the clamps on the valve itself, and it started. Thing is, if there was a leak there, it didnt care. When I clamped the lamp start, it didn\'t. So there is something weird going on that shouldnt be possible, obviously.

I can try tomorrow when I got more daylight to film it or something, if I get my mobile phone to start up ever again. Everything is failing here. At the same time -.-