timmy2take

iTrader: (7)

Boost solenoid plumbing.

I have just purchased a 97 sti with full decat exhaust and it seems to be over boost and hitting the fuel cut in 4th & 5th but seems fine in the rest of the gears.
I have had a look at the way my boost solenoid is plumbed in and i think it is wrong...

The pipe from the top of the boost solenoid that i believe is meant to go to the pressure side on the turbo outlet is missing. Instead the pipe from the pressure side on the turbo outlet is plumbed/T-ed into the hose from the boost solenoid to the aculator? As the picture show



Would this cause it to over boost as i thought that where its been t-ed back into the aculator line it would just run aculator pressure which would be lower than standard boost?
Unless the boost solenoid is still bleeding the pressure in the line from the aculator even tho the top pressure line is missing off the boost solenoid if that make sense?
I am not to sure how the boost solenoid is meant to work?
I thought it was top hose pressure side turbo outlet,middle hose aculator,and bottom hose bleed to inlet pipe?Or are the turbo pressure hose and aculator hose ment to be T-ed?

Atm my boost solenoid is plumb in like this...
Top, no hose
Middle, go's to aculator but is T-ed into the pressure hose on the turbo compressor housing.
Bottom, go's to the inlet/airfilter pipe.

Is it ok to just join the aculator and turbo pressure outlet hose together to run aculator pressure?

Is a 3 port or 2 port standard on a 97 Sti?

Heres the pic of mine, def. a 3 port

timmy2take

iTrader: (7)

Problem solved, just a case of plumbing it in the way it should have been. God knows what the old owner was doing?

GMballistic

iTrader: (1)

[quote=timmy2take;8855602]Problem solved, just a case of plumbing it in the way it should have been. God knows what the old owner was doing?[/quote]

That's always a problem, people touching things that they don't really understand
Enjoy the Scoob mate

STI_Baly

iTrader: (23)

FYI it should be a 2 port as standard.