B4 Boosting only 0.5 bar

J

Jaak

Petrolheads
Hi,

I was looking around but could not find a solution to my problem.

I have a 2000 Legacy B4, no modifications.
Since today I noticed that I'm not hitting full boost anymore (staying at 0.5 bar, jumping to .6bar) on both turbos.

All I did since it was running fine, is that I removed the intake resonator.
Also fiddled with the gearbox dipstick. (i heard there is something there that can be caught up?)

Also my tank is halfway now, using E5 with 1/3 bottle NF booster to full tank.

Before the car was boosting ~1bar on both turbos.

Any ideas why this would happen?

Thanks :smile:
 
Could be it went into "safe" mode while running lower octane fuel.... put more booster in.. disconnect the battery for 10 minutes see if that helps
 
[quote author=Dagnut link=topic=24585.msg291539#msg291539 date=1277395027]
disconnect the battery for 10 minutes see if that helps
[/quote]

Thanks :thumbsup:
I this how I can reset the ECU?
 
Any check engine light coming on?

Legacy boosting problems are head wrecking.
 
[quote author=AndyC link=topic=24585.msg291607#msg291607 date=1277414729]
Any check engine light coming on?

Legacy boosting problems are head wrecking.


[/quote]

No, there weren't any check lights coming on.
It felt like only the second turbo was boosting full.

I reset the ECU, and poured 50ml of NF to the half tank.
Tomorrow I'm going early to the shops. I'll see then if it feels better.
I'll keep a good eye on those check lights!

Thanks :thumbsup:
 
[quote author=Dagnut link=topic=24585.msg291539#msg291539 date=1277395027]
Could be it went into "safe" mode while running lower octane fuel.... put more booster in.. disconnect the battery for 10 minutes see if that helps
[/quote]

Thanks Dagnut :thumbsup:

Problem solved!
 
[quote author=Jaak link=topic=24585.msg291721#msg291721 date=1277464237]
[quote author=Dagnut link=topic=24585.msg291539#msg291539 date=1277395027]
Could be it went into "safe" mode while running lower octane fuel.... put more booster in.. disconnect the battery for 10 minutes see if that helps
[/quote]

Thanks Dagnut :thumbsup:

Problem solved!
[/quote]

It's only a stop gap solution but...your car should not be going into safe with E5 alone never mind having nf added...I would get a diagnostic done on the sensors
 
Long shot but removal of the resonator box could have messed with the airflow and caused a boost spike causing it to go into safe mode.
 
are legacys not only sposed to boast to about 0.5 on secondary and 0.6 on primary turbo when standard?, surely not 1 bar :ponder2: mine wasnt anyway.
 
[quote author=Kevinc link=topic=24585.msg291799#msg291799 date=1277482371]
are legacys not only sposed to boast to about 0.5 on secondary and 0.6 on primary turbo when standard?, surely not 1 bar :ponder2: mine wasnt anyway.
[/quote]

eh, no mate.. 0.5 is very low.. did you not think it was a bit underpowered?
 
[quote author=silverbullitt link=topic=24585.msg291817#msg291817 date=1277486607]
Mine boosts to 1.0 and 1.4 respectively ...
[/quote]

Is that standard, or did you up the boost?
That must sound like an wild animal!
 
it was set at .6 and 1.0 until it got a rebuild and remap by bob rawle @Stituning ,
its goes like sh1t off a shovel in fairness to her , and the feeling of power in third gear when she hits peak boost is savage . when i let off the throttle the nose of the car dips about 8 inches .... its gas
 
[quote author=B4 soon link=topic=24585.msg291894#msg291894 date=1277511972]
My car is bog standard and does 0.8 primary and 1.1 secondary
[/quote]

That sounds about right. My old Legacy was mapped 1BAR and 1.4BAR.
 
mine was mapped for 0.7 and 1.0 but was sure ive lost some along the way, When getting a new clutch last year, after the car was put back together, an oil leak from the oil seal where the ( my terms) bar that turns the wheel enters the gear box (front right). It was only small but since i got it fixed last week the car feels faster, especially when boosting. to be honest its like a brand new car mate. dont know if this helps but i had about half boost and low power under 2500 revs and even boost failure. Guy who fixed said it affects everythin!! ignore if stupid :icon_redface:
 
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