v5 wrx factory boost

[Marky]

That is correct, they are also notorious for failling if you look at them sideways.

I wouldn't by any means say yours is poked, more just it's a known issue with them, they really seem to dislike anything other than a dry filter in the stock airbox for some reason

[ajb86n]

ok cool thanks so much for ya help i went to few wreckers yesterday trying to fingd a restrictor pill but no luck have a few to go to today thou so fingers crossed i find one will keep you all updated

[ajb86n]

hey guys

so just went and bought some welding tips at 0.9 and its still not holding boost and is hitting about 1 bar so have i gone to small and should i get a 1mm tips

also does placement have a factor in this as they are quite long tips and i have it closer to the wastegate end of t peice however the t peice is pretty much touching the pill

CHeers

[Rosssub]

Doesn't matter how close to the t-piece the pill is, providing the t-piece isn't restricting flow through the pill. As long as the pill's on the compressor side not the WG side:

A bigger pill will lower boost. Is it getting to 14psi then dropping again still? If so, try blocking the BOV recirc hose off completely (BOV-intake).

Edited October 15, 2015 by Rosssub

[ajb86n]

hey rossssub yea mate in the right spot i think i need a 1m as it hold boost better but still dips to about 0.6-0.7 bar

a mate of mine has a spare boost controller whats your thoughts on them??

[Rosssub]

Try blocking the BOV recirc hose off first. The BOV could be opening at full boost and dumping back to the intake lowering boost, then closing, boost builds and then it dumps again.

The 1.0mm pill will lower max boost from 14psi to about 12psi, but it wont stop it dipping down to 7psi.

Boost controllers are fine to use as long as you don't over do it. I've been using a cheapo trademe MBC for a year with no complaints:

[ajb86n]

Ok mate I'll block off blow off valve after work and let u know cheers rosssub

[Marky]

Or maybe the thing is pulling boost back on purpose cause it's pinging it's head off for a different reason

Remember using the restrictors is only changing the characteristics of the factory boost solenoid - a manual controller might fix the boost holding issue but is masking the actual reason it's being pulled back

Kind of like how taking a triple shot of pre workout might make you lift heaps once, but wont fix manlet syndrome

[hijacka]

Can't help but notice afm being mentioned twice from 2 good members but seems to be falling on deaf ears. i have a few here working.. Wondering if the cel codes are clear? You can try clean with afm cleaner but you need to use a cotton swab soaked in afm cleaner to gentle wipe over the sensor part. Does it have a pod filter or factory?

[Marky]

Yeah on second thoughts, the boost rise then massive cut back then repeat does seem a lot like hitting boost cut, over and over

Like I said a week ago

[ajb86n]

I may have just found the reason marky just checked the codes and knock sensor code come up so ill be getting that done hopefully next week but no other codes

will be getting a full sevice in the next couple weeks hopefully aswell

hijacka na mate standard engine no poddy or anything but will clean the maf sensor tonite and see how it goes

Cheers everyone

[hijacka]

 ajb86n said:

I may have just found the reason marky just checked the codes and knock sensor code come up so ill be getting that done hopefully next week but no other codes

will be getting a full sevice in the next couple weeks hopefully aswell

hijacka na mate standard engine no poddy or anything but will clean the maf sensor tonite and see how it goes

Cheers everyone

I have fixed quite a few knock cel codes via replacement of the afm on v5/v6 and tts of that gen

Sometimes you can get away with a clean but most of the time it will need replacement.

Subaru armstrong have knock sensors for 70-80 dollars. I have both functioning parts here

[ajb86n]

cheers hijacka will keep u updated will defs get knock sensor done anyways as its my daily so need it to perform but i cleaned the maf sensor last night and still have cel code but will keep u updated