hi guys,can anybody tell me what sort of reading i should be getting from my newly fitted prosport boost gauge?
the gauge is in psi and was wondering what it should read at idle,gentle acceleration,full throttle,over-run etc.

heres what im getting--- idle/overun about 9 under 0 psi
gentle throttle about 1/0 psi
full throttle/boost 7 over 0 psi.

does this sound correct?i have t'd into a line coming off the inlet manifold as per instructions.
the car is an 01 bug uk.

 

Mine's sits at an unwavering -0.7bar at idle (-10psi) - so fine I'd say.

Gentle throttle, without deliberately trying to gun the engine, tends to get up to <0bar/psi i.e. partial vac/atmos pressure, so fine again.

7psi is only 0.5bar, so I think you're only getting raw w/g spring pressure i.e. no BCS duty going on. Has the ECU gone into limp home mode...


If you have an unused nipple on the IM, then use that to dirctly plumb the gauge to. If not, then T into the vac line for the dump valve.

 

id dont know what id do if it it wasnt for the three amigos as the missus calls them (joz,splitpin,dynamix!!)

thanks joz,i dont think im in limp mode.the car does pull pretty strongly but i am t,d into a line at the front of the engine next to the alternator wires which shares it with a plastic non return valve or damper of some sort(brown n black plastic).
il try t,ing into the dv line tommorrow


ps what is BCS?

oh and ive just watched a prosport demo on you tube and the car there seemed to operate the same as mine!!!

 

boost control solenoid.

It's an electro-mechanical valve (mounted on the driver's inner wing) that open's when 'told to do so' by the ECU (via various engine sensors). If everything's fine, then you'll get full BCS duty at WOT/certain >rpm. Depending what variant of Impreza turbo you have, you should see at least 0.7bar (10psi) at full boost.

So, the 7psi you're seeing, is down on the OEM boost target by 30%... at least!

 

right.while we are the topic of the bcs,i read that when i connect the 2 plugs under the dash i should get a clicking from my solenoid.is this right or does it only apply to classics?coz i dont get the clicking.(how do i undertake a successful check)the turbos a standard td04 i believe,thanks bud.

 

Yes it should click away continuously and rapidly (I think).

This is all mounting evidence that there's an issue with it or the electrics that run between it and the ECU etc.

You need software/cable/laptop or PC to check for fault codes on New Age - see here:-

Scoobypedia | Trusted knowledge for everything Subaru | Knowledge / Reading ECU Fault Codes

 

Yes it will click away if the check engine light flashes on the dash.

Sounds like you are running wastegate pressure only.

Have you changed any boost pipes off the turbo or changed anything recently ?

 

ok.today i t,d into the dv vac line.i now have -19 at idle,- 1/+2 at part throttle but happily achieved 14psi at full chat.although im happy that it seems to be boosting enough im not sure what to make of the minus figures at idle.(im no expert lol).

as for the bcs,i connected both green plugs at tea break and while i got the cel flashing continously (1 sec on/1sec off),the fans were doing there cycle but no ticking from the bcs.no internal movement when my hand was on the side of it and no amount of gentle tapping made it 'go'am i doing the correct check with these green plugs or is there another way of testing it.i do have an automotive multimeter to hand if need be.

thanks for your help guys

 

Milliemoo - if you want to meet up for me to check it out I am only down the A10 from you in Ely. You are doing the right thing on the test connectors - it should be clicking.

-19 isnt right at idle - something very weird there.

 

cheers dynamix,might just do that.i was only getting -10 when t,d into the other line,like you say,weired!!!i do have a baileys dv on at the moment as my mate is using my o/e dv when his started giving him trouble.would this be a factor?

 

yes probably. Baileys are reknowned for leaks, not holding boost and general running issues. Standard dump valve is the best to have.

 

ok bud.your the pro.should be getting the o/e back this week.i normally run that anyhoo along with airbox.as soon as the weddings over (literally)im gonna throw a de-cat d/pipe n up/pipe on there and a re-map from some chap ive heard of in cambridgshire lol

 

 

Yeah millimoo, -19psi is way to low a reading for manifold pressure at idle. Your previous -10psi was bang on.

I thought it was the 2 black connectors that had to be connected for fault code finding, not the greens??? To do a ECU reset, both blacks AND greens are connected:-

Scoobypedia | Trusted knowledge for everything Subaru | Knowledge / Reading ECU Fault Codes

 

Joz - that is only for classics mate - not on a newage. You cant read faults (or reset) without OBD scanner/laptop on a newage.

 

Well yes, I thought he did have a New Age...... until he said he connected green connectors!

Now confused.

 

They have green test connectors.

 

LOL! Didn't know that.

I thought you had to check codes on a New Age via laptop, etc too!

Cheers - confusion now ceased. lol

 

They have test connectors to put it into test mode so as you can check the operation of fans, solenoids etc. It is also used during the reflash process but you cannot read codes without laptop or obd scanner.

 

Ah right - I'm with yer.

 

sorry to drag the thread out but i have an update.

i re-fitted the o/e dv this evening and still i get -19 on idle!
i removed the 2 port bcs and tried a wash out with cleaner.i noticed one port had a little spring pressure inside which if pushed gently allowed the fluid to wash thru from one port to the other.
i also connected the green plugs but still no clicking,although i had a reading of 11.57 volts at the loom plug terminals(if i read the meter right).i take it im getting power to the bcs but the bcs must have expired!!
im not sure why i would get the -19 reading from -10 simply by changing my t in point!

just checked out scoobypedia and the pic for t'ing into was exactly where i had the line before but wasnt reading full boost as per first post content!!