scooby_impreza

Hey all, so my UK turbo 2000 year 2000 is suffering from no power threw out every gear. You hear the turbo spool up but it just didn't give you that pull.
Things I've replaced/tried

New spark plugs.
New maf sensor.
New coil packs.
New turbo intake pipe.
Replaced all vac pipes with high quality silicone hose.
Replaced knock sensor.
Cleaned Boost solenoid and Map sensor.

Really am giving up now. Any help??
Car is standard

alcazar

iTrader: (2)

Had it to a decent specialist?

scooby_impreza

Not yet as can do most things myself but with this I think I'm going to have to. It feels like 150bhp not 211 like its ment to be

Pross

iTrader: (3)

Sounds like a vac leak to me.

scooby_impreza

I've replaced all vac hoses I know to, I do get a funny little scream noise under boost

Pross

iTrader: (3)

I get that too, she normally gets over it by 3rd gear.

You should probably get the thing looked at.

scooby_impreza

Think I'm going to have to, I've tried basically everything I can think off and nothing

Infected by sti

iTrader: (6)

Boost leak, weak actuator, vacuum lines perished or off, split intake, could be turbo related, could be map related reigning in the timing, blocked cat, could be many things

If you've tried the obvious and pretty confident on the spanners and know what to look for, then I'd bite the bullet and take it somewhere for diagnosis.

alcazar

iTrader: (2)

Yes, get it diagnosed properly. If it's a vac leak it could easily be running lean...which leads to the dreaded detonation

scooby_impreza

Thanks for all the comments, gna have to get it booked in and looked at. The car doesn't miss/hessitate at all it just feels 150bhp not 211.

JDM_Stig

iTrader: (3)

have you got a boost gauge fitted and does it run a standard DV ?

scooby_impreza

Hi yes got a boost gauge and baileys dump valve, boost gauge hits around 0.9 bar fine but just didn't pull, have also tried blanking off the dv but still the same

*matthewturb2000*

iTrader: (11)

Sure you haven't just got used to it

scooby_impreza

100% not just got used to it, I struggle to overtake my friends corsa.....

*matthewturb2000*

iTrader: (11)

Seized brake calipers?

scooby_impreza

Brakes apear to be working fine, I'm looking at the car again now just cant see nothing it could be

scooby_impreza

Mentioning the brakes.. The abs light is on, would this cause anything? Ie limp mode or anything

tjmatt

iTrader: (1)

Scream noise on boost could be an air leak post turbo which would make it run rich and work the turbo harder which could cause a power loss even if boost is made. A screeching noise might be that the turbo is gone and the compressor or turbine wheels are hitting their housings. However if you are getting the boost it seems unlikely you could be that low on power just from running a bit rich or lean.

Have you checked that you are actually firing on all 4 cylinders? Pull each ignition lead in turn and check for poorer idle. After this though I'd suggest you look at more mechanical issues, do a compression test and check the cam-belt timing because if you have spark and fuel to all cylinders and 0.9bar boost you'd be hard pushed to be that low on power without something amiss mechanically.

Finally although unlikely, a mismatched gearbox and diff could have been fitted previously which would significantly increase rolling resistance (and would shortly break) but you'd be able to tell because it would feel terrible to drive at speed. In the same line of thought, ensure all tyres are the same size & correct pressures.

What RPM are you making 0.9bar of boost by? This might be a good indication of what is wrong.

tjmatt

iTrader: (1)

Never tried to read ABS codes, but this might work:

http://www.ultimatesubaru.org/forum/...ead-abs-codes/

Have you checked there are no stored ECU codes? Does the Check engine light work and has it not been disabled?

scooby_impreza

Thanks for that matt,

You say check if firing, never done this before how do I do it..

I did do the oil cap test to see if air pulsed out or smoke and it was just pulses of air

scooby_impreza

No cel codes check engine light works

ossett2k2

iTrader: (9)

If the brakes are ok,pads or handbrake shoes not binding,car rolls ok? Clutch slipping?

scooby_impreza

car rolls fine, had a new clutch about 2 months ago

ossett2k2

iTrader: (9)

Did you check intercooler Ypipe? Prone to split as are the intake pipe

scooby_impreza

Yes checked that car is sending me crazy really is

ossett2k2

iTrader: (9)

Had the airbox off,checked filter? Or nothing strange left in there?
Fuel filter?

scooby_impreza

airbox etc is ok, havnt checked fuel filter. would this cause such a problem?

JDM_Stig

iTrader: (3)

as was asked, when is it making 0.9 bar, what RPM and how long does it hold this ?

super_ted

iTrader: (30)

Poss hole in intercooler? Need to get the boost pipework pressure tested or smoke tested to see any leaks.

scooby_impreza

sorry jdm, its hitting around 0.9 at around 3000 rpm but in 3rd its hitting 1.2-1.3 bar