Any clues?

 

It should go to the manifold.
there are 3 connected in a row just infront of the throttle housing.
1 goes to the pressure exchange solenoid (the brown thing)
I think the other 2 go to the fuel pressure reg or servo.

Why don't you pull of the bottom hose from the BSC and see what happens.

You havn't yet confirmed if the BCS top and Middle hoses are correct yet ??

 

This site shows the 3 vacum connection on the inlet manifold I am talking about.

Ignore the t-piece and braided hoses in the photo as they are just for his boost gauge install.

FITTING A BOOST GAUGE

 

Sorry scott, I should have said. The other two hoses off the BCS were correct.

 

Now then. I disconnected the bottom hose and have taken the car out for a short run. Boost/Fuel Cut was reached very quickly.

Fuel Cut was way past 1.5bar.

 

So you diconnected the very bottom hose from the Boost Control Solenoid i.e the one that comes out of the base ?

where does this hose connect to at the other end ?

If so that thats your problem. Maybe it was partially blocked.

You need fit a hose suitable to be fed back into the air intake expansion box and then fit a restictor of some sort into the hose.
The restrictor needs to havesomething like a 1.5mm hole in it. A small piece of brass or alluminium would be fine with a hole drilled through it.

Then adjust the size of the hole until you get the desired 1.1bar of boost.

Not sure why fuel-cut was so high. Unless it has been removed from you remapped chip.

 

Right O. Andy @ ESL did send a replacement set of chips, he said he had up'ed the boost considerably as the boost circuit was lazy somewhere. So I think what i'll do is fit the original chip-set and get myself an OE solenoid pipe with the brass restrictor fitted. Hopefully that'll sort it.

Thanks for all your help Scott. I owe you one big time.

Cheers.

Dan.

 

You will want the following Parts :

1-Off 807505442 HOSE
1-Off 22326AA090 ORIFICE
2-Off 805912050 HOSE CLAMP

 

Thanks..

 

One thing to say, and that is WOOOOSSSHHHHH!
See you in my rear view mirror.

Subaru could not get the part until Monday. I could'nt just keep looking at her dead on the drive in bits. So. I took the resonator box and pipework apart and to my surprise there was an aftermarket brass restrictor in line and like Scott advised I took a small drill to it and opened it up slightly. Put back together and well, you know the rest.

She is now at just over 1.1bar, more toward 1.2bar (is this ok?), and goes like stink.

Thank you to everyone who had an input, espeicially Scott.T..

Cheers guys..

Dan..

 

Glad that's sorted, I like to help out where I can.

If the map is set to 16-16.5psi then 1.1-1.2bar on a gauge is about right.


Try it in 5th from low rpm to 5,000rpm and see what it reads then.
It may be a little higher and may surge at bit at full boost.

This is an indication that the ECU map Boost control duty is too high or the restrictor size is slightly out.

Adjust too suite..........

 

Spot on Scott. Power delivery is very smooth now, and lots of it. Last niggle now, boost peaks briefly at 1.4 bar then returns to 1.1-1.2bar. Will be fitting the original chipset later, that should solve that. Andy did warn me that when the problem was solved not to use the second chipset as boost duty on them was a lot higher.