Manual boost controller fitting

[miles2102]

Looking at fitting a manual boost controller on my 94 wrx as a temporary measure to stop my overboost until I free up the funds to get the issue sorted properly. Hoping you guys can tell me best way of fitment. I understand this is not the answer to my issue of overboost but cannot afford to have it looked at the moment so just want to manage boost until I can resolve the overboost

[Rick 2014]

I would start with checking for split hoses for air leaks I wouldn't get a manual boost controller to sort the issue out

[miles2102]

I know it's an ongoing battle with it, I've just replaced the engine and replaced and checked every hose 10 times over, nothing seems to be split.

Would a faulty bov cause an issue with boost?

[Rick 2014]

Yes faulty bov valves are very common.I had a bad fault on my forester bov valve I did away with it and all was fine after.How ever I would have though the bov valve would have stuggled to make boost if it was knackered not over boosting

[miles2102]

Yeah your probably right with the bov, I'm struggling to justify spending money on parts I might not necessarily need hence fitting a boost controller to lower it a bit to stop fuel cut tell I can send it in to be looked at, I'm constantly watching the boost guage whilst feathering the throttle it's killing me not being able to drive it normally

[Rick 2014]

Have you tried cleaning the soloneid out at all

[miles2102]

Yep done that twice and tried a spare one but still no change

[Rick 2014]

Have you looked at the boost restrictor pill to see if its blocked  and cleaned the pipes out

[Rick 2014]

Ive been replacing my old vac pipes with new gear a bit at a time and ive seen a marginal difference

[miles2102]

All the vac pipes are brand new but there was no restrictor pill? Take it that's gonna be my problem then

[Rick 2014]

All the vac pipes are brand new but there was no restrictor pill? Take it that's gonna be my problem then

;) try that

[miles2102]

Any ideas of where is best to pick one up and what size is recommended or is it try and see what happens?

[stants]

A restrictor pill ? Your subaru dealer can sort you out relatively cheaply. I think there's three sizes.

[savage bulldogs]

Sorry was going to reply on your other thread but couldn't find the info on restrictor pills and vacuum line positions I'd posted before .

http://uk.subaruownersclub.com/forums/topic/6050-more-boost-disappointmentslight-happiness/

Think your model is covered on there

[miles2102]

Lovely cheers bud il have a crack at getting that sorted and let you know how I get on

[savage bulldogs]

No problem bud hopefully it will be something simple .

Shame I didn't take any pics of the standard vac lines on my 94 sti [emoji53]

As mine is now far from oe

[miles2102]

It's just a pain trying to constantly monitor boost and feather the throttle, I can feel that it's quick but it's so annoying not being able to put your foot down! Il look at sorting the restrictor pill this week and hopefully sort the issue but out of curiosity where do the boost controllers fit, always wondered. Do they just sit between turbo and actuator and ditch the boost solenoid and vent pipe to induction

[Rick 2014]

Did you replace the hoses your self?.Your problem now is if you don't have the restrictor pill is getting the right one for the car there is a few variants

[miles2102]

Right i had a little fiddle over the weekend at tried a 2mm restrictor and still have boost spike, on dual carriageway it was holding about 0.9bar but is still spiking when giving it the beans (hits about 1.1ish bar). So I dropped it to 1mm restrictor and it still spikes but doesn't hit fuel cut but it's only running about 0.7bar. So my next question is I could fit a 1.5mm restrictor but it's the actual immediate spike I get which causes the fuel cut when giving full throttle? Surely there must be a way of keeping a steady 0.9bar without it dropping off and also spiking above?