ok having an issue with my v4 wrx got a boost gauge installed and its peaking at just over 1.2 bar and settling down to 1.1 which if i hold it at full throttle it will go into safe mode at 0.5 bar and takes 10-15 mins at normal driving to come out again if i control it with my right foot and dont let it go over 1 bar i have no probs was looking today and it seems it has a vf22 fitted i could be wrong but i thought as standard these had a td04 the vacuum lines seem to be different to my last couple of impreza's as well but they were sti's for example the vacuum off the wastegate doesnt join the other one coming from the turbo with a t piece they both just head back towards the solenoid separately cant find anything online for my version which shows the denso marked piece as well as well as the solenoid so if anyone with a v4 wrx could throw up a pic of the lines it would be much appreciated
overboost UPDATE
- Thread starter Paul555RA
- Start date
Re: overboost
[quote author=Paul555RA link=topic=38659.msg441815#msg441815 date=1374838661]
the top metal bit with denso on it has 3 pipes coming of it the plastic one below had 2 not sure which is the actual solenoid there is def no decat emissions were perfect for nct
[/quote]
If there is no tee piece at the turbo it should have a 3 port solenoid, how long has it bee doing this ?Any work done recently ?
[quote author=Paul555RA link=topic=38659.msg441815#msg441815 date=1374838661]
the top metal bit with denso on it has 3 pipes coming of it the plastic one below had 2 not sure which is the actual solenoid there is def no decat emissions were perfect for nct
[/quote]
If there is no tee piece at the turbo it should have a 3 port solenoid, how long has it bee doing this ?Any work done recently ?
Re: overboost
only work done since ive had it is full service and timing belt change and few small bits for nct no engine work for nct though only got boost gauge fitted couple weeks ago and thats when i seen it i changed the dump valve the day after the boost gauge was fitted as it was leaking and was causing hunting on warm startup but hasnt been doing that since i changed it i put on another hks ssqv only thing there though its a small nipple coming off the dump valve and a large on on the block so ive a load of tape on dump valve side to get a seal
only work done since ive had it is full service and timing belt change and few small bits for nct no engine work for nct though only got boost gauge fitted couple weeks ago and thats when i seen it i changed the dump valve the day after the boost gauge was fitted as it was leaking and was causing hunting on warm startup but hasnt been doing that since i changed it i put on another hks ssqv only thing there though its a small nipple coming off the dump valve and a large on on the block so ive a load of tape on dump valve side to get a seal
Re: overboost
i can hear a hissing coming from the back of the boost gauge at full boost but not at any other time they have that plumbed in on the pipe coming from the engine block to the immediate left of the throttle cable coming back just before the large round platic piece on that pipe
i can hear a hissing coming from the back of the boost gauge at full boost but not at any other time they have that plumbed in on the pipe coming from the engine block to the immediate left of the throttle cable coming back just before the large round platic piece on that pipe
davelegacy
Member Number 16
Re: overboost
From memory v4 wrx should have a 2port.
V4 STi had 3 port.
Factory turbo was a vf24.
From memory v4 wrx should have a 2port.
V4 STi had 3 port.
Factory turbo was a vf24.
Re: overboost
[quote author=BazGF8 link=topic=38659.msg441826#msg441826 date=1374841506]
The gauge could actually be faulty, where about are you in the country?
[/quote]
Im in Sligo the gauge seems to be ok judging by boost cut anyway holds at exactly 0.5 bar
[quote author=davelegacy™ link=topic=38659.msg441827#msg441827 date=1374841521]
From memory v4 wrx should have a 2port.
V4 STi had 3 port.
Factory turbo was a vf24.
[/quote]
Cheers dave may look into that to so not 100% its a vf22 as the writing is quite faded but looks like it from what little i can see
[quote author=BazGF8 link=topic=38659.msg441826#msg441826 date=1374841506]
The gauge could actually be faulty, where about are you in the country?
[/quote]
Im in Sligo the gauge seems to be ok judging by boost cut anyway holds at exactly 0.5 bar
[quote author=davelegacy™ link=topic=38659.msg441827#msg441827 date=1374841521]
From memory v4 wrx should have a 2port.
V4 STi had 3 port.
Factory turbo was a vf24.
[/quote]
Cheers dave may look into that to so not 100% its a vf22 as the writing is quite faded but looks like it from what little i can see
Re: overboost
still havent had a chance to sort this and i need to replace the maf now but this is a few pics of the setup if it sheds any light for anyone
three pipes coming off this silver piece which i assume is the boost solenoid
these are the pipes which go to it, these 2 off the turbo
and this one from the manifold
then there is this plastic piece underneath the solenoid
which has this pipe going to it
this is the same pipe that has been split to go to the boost gauge the clear pipe is heading to the gauge
still havent had a chance to sort this and i need to replace the maf now but this is a few pics of the setup if it sheds any light for anyone
three pipes coming off this silver piece which i assume is the boost solenoid
these are the pipes which go to it, these 2 off the turbo
and this one from the manifold
then there is this plastic piece underneath the solenoid
which has this pipe going to it
this is the same pipe that has been split to go to the boost gauge the clear pipe is heading to the gauge
Re: overboost
ok update on this fitted a second hand maf last night reset the ecu and it has made it a lot better but im not sure still if its right in 1st-3rd its fine boost climbing steadily and holding a hair over 1 bar but in 4th and 5th its still peaking at 1.2-1.3 bar and then dropping back to a hair over 1 bar but hasnt been going into safe mode (but have only driven car on short test drive) will take it for a longer spin in a while do these figures sound about normal for this car and turbo setup or am i right to still be concerned
ok update on this fitted a second hand maf last night reset the ecu and it has made it a lot better but im not sure still if its right in 1st-3rd its fine boost climbing steadily and holding a hair over 1 bar but in 4th and 5th its still peaking at 1.2-1.3 bar and then dropping back to a hair over 1 bar but hasnt been going into safe mode (but have only driven car on short test drive) will take it for a longer spin in a while do these figures sound about normal for this car and turbo setup or am i right to still be concerned
[quote author=Paul555RA link=topic=38659.msg443349#msg443349 date=1376306793]
Yeah def a wrx haven't looked up applied model code but based on brakes interior and dash its def a v4 wrx but on a side note i had a look at the ecu and it's an 1s ecu and from what little I can find about it it seems to be meant to run what I have
[/quote]
More than likely a vf23 on yours , Vf24 came on Version 4 sti
Yeah def a wrx haven't looked up applied model code but based on brakes interior and dash its def a v4 wrx but on a side note i had a look at the ecu and it's an 1s ecu and from what little I can find about it it seems to be meant to run what I have
[/quote]
More than likely a vf23 on yours , Vf24 came on Version 4 sti
davelegacy
Member Number 16
Some V3 Wrx's had VF22.
V3 and V4 sti be vf23. Some had vf24.
V4 wrx had vf24
V3 and V4 sti be vf23. Some had vf24.
V4 wrx had vf24
