RIGHT, ITS A 65 WRX WAGON

its mods are
3'' bell mouth D,pipe
3'' system
TDO5 16g
OE heat wrapped headers (an downpipe an turbo)
sti hearder tank
hks induction kit with max flow pipercross cone
autobahn front mount
z4 ecu
pulled 312bhp/290lbft on the rollers at 1.0bar (when the boost held)

ive changed the turbo once, 3 different sets of piping, cleaned the boost solonoid, 3 actuators, an apexi avc-r an LOADS!! of £££ taking it to garages here an there? been on 50 different forums. my car will not, for the love of god stop over boosting? even disconnected the actuator jammed the waste gate open an it STILL hit the fuel cut???????? then the turbo was changed, been ok for 2 months... now its back. so i ask any impreza guru's out there, in desperation (the car's goin other wise) WHAT IS IT? how can i get it too contain boost???? frigging HELP

 

First get all the piping to the actuator etc checked. Try with the cat (catalytic converter) in place (might be a pain in ar$e with 3' system) and see if the boost peaks past the preset level or if it holds with the additional back pressure.
It maybe that the free flow nature of the exhaust can be one of the causes of boost creep, but check with other peoples experiences who have a similar setup.

 

Can you post up any pictures to go with this? It sounds like it should be something simple. Pics of all the boost pipework and vacuum hoses to and from the boost solenoid and map sensor etc could be helpful. And to make a diagnosis easier it may be worthwhile removing the electronic boost controller for now so the engine runs with the factory ECU settings.

 

is it mapped properly?

 

there are no cracks or leaks in the pipeing. ive had them under a magifying glass i firstly had a group N 2.5'' downpipe on (i forgot to put that in the first description) then changed to the 3'' bell mouth no difference on both. its not been mapped yet.

i cant afford £600 for mapping yet. or justify it. dont wana pay that an it still does it, an waste of 600 notes. id sooner it hold boost. then map it

its also now on the factory boost controller, set up correctly with the restrictor in place, boost comes in. goes to around 1.3 bar drops to 1.2 bar then WHACK!! fuel cut. ANY gear!! which is weird, cos the factory boost is 0.9bar. im out of money, idea's, an patience!! its like bein really really thirsty, an some one plonks a nice pint in front of yer! ''You cant drink that!!'' av got nearly 320 horse's to play with... an cant use it

 

Lets get this clear. It has no boost controller of any sort fitted at the moment, the ECU alone is trying to control boost, and it still boosts to 1.3bar?

Are you sure all the vacuum hoese are 100% connected correctly?

We can help if you give as much info as poss. Pictures can tell a 10000 words!

 

it has the factory fitted boost controller plumbed in. the boost controller top port goes to the compressor housing, the lower one goes to the actuator, the very bottom one is the bled air off the boost controller which goes back into the intake system after the maf sensor. the restrictor on the map sensor is back in place. so the boosting system is now factory.

an yes, with all that back in it boosts at 1.3. settles for a split second at 1.2 then i head put the steering wheel with the fuel cut!

 

Dodgy link

 

The restrictor pill goes into the bottom hose off the Boost Solenoid. The hose that goes to the air intake.

 

no wonder its running like that ther is no boost controller on it and its not REMAPPED for the mods you have done to it. get a boost controller installed and get it mapped asap or your going to have bigger problems than you already have at the mo

 

How does it run now?

 

4 of my friends have identical mods, with out maps, an they dont get problems, ive had a proffesional have det cans, an diagnostics. an the graphs checked off my last rolling road. thengine is as sweet as a nut. with 2 nice smooth curves of the torque an bhp. its just this boost prob???

i cant get the pictures on of the engine bay???

 

Boost Solenoid Plumbing

 

a ha!!! thats how you do it!!

 

The Boost Control Solenoid is the one with 3 nipples, the one at the top is the MAP sensor

 

it has the factory fitted boost controller plumbed in. the boost controller top port goes to the compressor housing, the lower one goes to the actuator, the very bottom one is the bled air off the boost controller which goes back into the intake system after the maf sensor. the restrictor on the map sensor is back in place. The restrictor pill should not be on the map sensor so the boosting system is now factory.

an yes, with all that back in it boosts at 1.3. settles for a split second at 1.2 then i head put the steering wheel with the fuel cut!

the very bottom one is the bled air off the boost controller which goes back into the intake system after the maf sensor The pill goes in here.

 

Dan, your quite right mate... i am an idiot, an i do feel abit silly, in my own defense. i do have knowledge of the subaru engine. but im still learning LOL. ive just swapped that restrictor round to ythe RIGHT place. im off out now with the missus. so i'll see how it goes an get back to yer.

Thank you for having the patience with me mate. true gentleman. be back in abit with a verdict!!

 

with the restrictor back in place, it boosted to an held at 0.9bar. an it felt horrible LOL but it held, which is the point. gonna see how it goes over the next feww days!

Nice one Dan!!

 

It'll be fine now. Get the controller back on and reset your boost to where it was on the rolling road.