boost problem

C

chriSTi

Petrolheads
howya lads can anyone shed some light on my boostin problem... when i put the foot down all is well til full boost (1.4)but only stays for about a second then drops to 1.0 - 1.1 and sometimes it may creep up another small bit, and as I said before it has a slight clicking on acceleration, it doesn't happen EVERY time, any advice much appreciated.... thanx :ponder:
 
If it didnt click you would have unusual boost or overboost so you want to hear the clicking noise anyway. Did it always hit 1.4 bar and hold it, and only now it doesent ?
 
... "when i put the foot down all is well til full boost (1.4)but only stays for about a second then drops to 1.0 - 1.1"

I took it that his car is set up for full boost of 1.4 bar but the problem was that it isent holding full boost ( 1.4 bar ) but droping back to 1 or 1.1 bar.
 
no there is no management system on car...... so overboost could be caused other things wouldn't you agree??
 
[quote author=Renno555 link=topic=1775.msg15417#msg15417 date=1173658190]
... "when i put the foot down all is well til full boost (1.4)but only stays for about a second then drops to 1.0 - 1.1"

I took it that his car is set up for full boost of 1.4 bar but the problem was that it isent holding full boost ( 1.4 bar ) but droping back to 1 or 1.1 bar.
[/quote]exactly .. its jus not holding full boost... the problem only started when the clicking started???
 
I have a simillar problem when I floor it I get a slight sqeeling noise (turbo spooling up)is the noise ok??? it will hit 1.3 bar and drop down to 1.1 or 1.0 dont know what its set up for.

also sumtines it will build up unevenly its kinda a ON and OFF felling .
COULD THIS BE MY BOOST CONTROLL SOLINOID :oops:
sorry for hijacking CRIS :cheers:
 
[quote author=huzzy link=topic=1775.msg16073#msg16073 date=1174431761]
I have a simillar problem when I floor it I get a slight sqeeling noise (turbo spooling up)is the noise ok??? it will hit 1.3 bar and drop down to 1.1 or 1.0 dont know what its set up for.

also sumtines it will build up unevenly its kinda a ON and OFF felling .
COULD THIS BE MY BOOST CONTROLL SOLINOID :oops:
sorry for hijacking CRIS :cheers:
[/quote]ha ha no problem mate... not sure about the squeelin noise but it sounds similar .. i was told its the solenoid so I'm gettin an Apexi 3 port one supposed to be the bizness.. George of GT performance will look after ya.. :thumbsup:
 
as far as I'm aware this is normal my last two imprezas have performed in this manner hits 1.4 bar for a second and then drops back to 1.1 sometimes even .9.
 
@ thedoc

thats not normal. can happen for a number of reasons. that problem needs to be sorted asap or one of these days you'll be forking out for a rebuild


George
 
As George say's :thumbsup:
You car should always hold boost lads, any drop in boost pressure
means there is a problem.

Huzzy any hesitation on acceleration normally indicates dirty plug's / faulty sensor

1.4bar boost is pritty high :shock: :shock: get it checked

Niall.
 
Dont mean to contradict anyone but i posted this problem on the uk sites asking for an opinion form sti owners with boost gauges and theirs all performed the same peak boost of 1.3-1.4 bar settling back to between .9 and 1.1 bar
 
you are right there are a lot of them doing that for different reasons, the problem ive noticed on forums especially uk ones is although you can receive good advice on them from well experienced owners and specialists you also get replies from people who really have not got a notion of what they are talking about but think they do. the other problem is you get lads who will read books and books on cars and read crap on websites and then go handing out advise on something they think they know about, when really they havnt a fucking clue :angry:

at the end of the day forums can be fantastic and you get great advise on them on the other hand they can be a curse and it happens to lads al the time where they post a question and they get bullshit replies. my advise is if you have any problems with major components such as engine, gearbox, brakes etc. go to a specialist about it or even them a call. these cars are too expensive and too precious to be taking chances with.
when you got your replies on the uk site did any specialist reply and say it was normal??

George
 
not having a go by the way mate. :thumbsup: just pisses me off when idiots go advising people on something they dont understand
 
A bit o.t.t there man, I'm just saying on the boost part of the question that my sti has acted like that since i have it, and my wrx was the same i.e when you nail the throttle the gauge hits about 1.3 bar and then comes back to 1-1.1 bar I asked the question to people who owned sti's and had a gauge fitted what readings they were getting and they were all the same. I personally dont think it is a problem or will cause my engine to go bang! surely after four years of owning an impreza behaving like this it would have happened by now. I also had the car on the rollers and specifically asked about boost and they told me it was fine. I agree with you about people posting as supposed expets who dont know their ar*e from their elbow talkling about det. and engines going wallop, from my expeience and people i know who own subarus, engine trouble only comes with modification. I'm not passing my self off as an expert here only giving my experience.
By the way is the supposed problem hitting 1.3 bar or not holding 1.3 bar.
 
Hey Doc,
your car if never modded will be factory set
to anywhere from .9 bar to 1.1 bar boost deppending
on model and year .

Id say it's more the boost gague giving a false readding
(most gagues aren't that accurate)

Im sure if you  connected to the ECU you would get a
boost readding of 1.1 bar period, maybe touching on 1.15 aprox
during hard acceleration  but it's that extra little bit of boost on
hard acceleration that can throw boost gaguges out .


Oh and Chris back to your original question as Davelegacy said
that clicking sound is more than likley the boost solenoid which if faulty
would give boost readding's like your getting.

Personaly i wouldn't run an impreza on say 1.4 / 1.5 bar boost without
upgradding the internals of the engine

Niall.
 
[quote author=Niallyboy link=topic=1775.msg16137#msg16137 date=1174503802]
Hey Doc,
your car if never modded will be factory set
to anywhere from .9 bar to 1.1 bar boost deppending
on model and year .

Id say it's more the boost gague giving a false readding
(most gagues aren't that accurate)

Im sure if you connected to the ECU you would get a
boost readding of 1.1 bar period, maybe touching on 1.15 aprox
during hard acceleration but it's that extra little bit of boost on
hard acceleration that can throw boost gaguges out .


Oh and Chris back to your original question as Davelegacy said
that clicking sound is more than likley the boost solenoid which if faulty
would give boost readding's like your getting.

Personaly i wouldn't run an impreza on say 1.4 / 1.5 bar boost without
upgradding the internals of the engine

Niall.cheers niall internals have been upgraded an its jus now its actin up.... all will be well with a new solenoid... thanks again













[/quote]
 
You must log in or register to reply here.
Back
Top