pflowers

Hi, drove my 03 wrx yesterday all fine. Got in it today and starts and runs ok but no power, the turbo is not spooling up. Stopped the engine for 5 minutes, restarted all fine again, running perfectly. Next time I tried no power again. I have checked all pipes / connections, everything appears ok. There is a slight rattling noise coming from the turbo area if you raise the revs to 1500 then drop them down again, although that may have been there all along.

Any thoughts on what would make it work, then not, then work again?


Cheers

addi monster

iTrader: (6)

Could be the impeller is sticking (fubard turbo), if it was a boost leak im sure it would be happening all the time.

JDM_Stig

iTrader: (3)

what dump valve has it got fitted, id its a after market it could be sticking and you would loose boost.

Krieger

Hi!

Check Boost Solenoid. Happened to mine. U can just clean it with soemthing simmilar to brake cleaner.

pflowers

Thanks guys, it has got an aftermarket dump valve, I cleaned it all seemed ok but no difference. Where is the solenoid to check? The car is very down on power, won't really go over 60, surely if the turbo wasn't working it would just drive like a n/a. Its now like it all the time. The car was remapped on Monday but has been running fine since.

addi monster

iTrader: (6)

Did you not say you had no boost ? which is a n/a turbo not working.
The boost sol is on the inner wing (drivers side)

pflowers

Sorry I meant if the turbo wasn't working I would imagine it would just drive like a standard 2.0 sport impreza or is that not the case?

Krieger

You can see pic. here: http://www.scoobypedia.co.uk/index.p...ontrolSolenoid

If it's after restart works,than it's not mechanical(turbo,wastgate etc). At least shouldn't be...

After remapped... Welll... Maybe there is some error in ECU to boost control... Should just connect to OBDII and check all parameters... Or go to those, who remapped...

pflowers

Ok found the boost solenoid, just pull the pipe off and give it a clean I suppose?

pflowers

Car was remapped by Duncan at race dynamix

addi monster

iTrader: (6)

duncan is out of the country at the mo, txt him mate im sure he will reply/advise

Krieger

Remove it... And use some spray and clean it... But not sure,that u can use any...
Well... even someone like prodrive can make some mistake ir remapping... It's better to go and check with PC all data from ECU, than spend many hours doing something on your own... If there is no problem in all meassurements.. than check turbo,solenoid...

addi monster

iTrader: (6)

Yes they can but dont start blaming maps as this was an intermittant problem, if it was a mapping problem it would of been there from day 1

its clear to me that somthing has packed in.

pflowers

Yes I believe Duncan is in Cyprus, hopefully he can give me some guidance as to what it could be. Can't see its anything connected to the remap though, but what do I know.

How would I know if the turbo had gone, would it smoke or anything?

Krieger

As we all know... U can't blame someone, before it's prooven... So that's why it's beter see, what ECU is showing in that moment, when is no boost... After reMAP u get more power... more boost... And it can cause some old, fault pipe, wiring, mechanical damage,what is normal and u should count on that... So my subjective opinion is just to check with electrics and than start to ,,dig in'' in engine bay...

pflowers

Yes i'm certainly not blaming anyone, just one of those things I suppose.

addi monster

iTrader: (6)

it depends on how its failed, somtimes they smoke if the oil seals have gone, where are you based.

pflowers

How do I reset the ECU? Just wondering if it has gone into 'safe mode' as it is so down on power..

Krieger

To check, if it's turbo.. U can unplug tube from wastegate and try than.. But be carefull... Than turbo is working on 100%... It will blow 1.5 bar or even more... Just quickly check if it boost's... If no... than problem is in turbo...

pflowers

No smoke or anything just as said in my first post a knock / rattle from that area when you raise the revs to about 1500 then let the revs drop, although this may have been there all along.

Based near Swansea.

Krieger

Try to remove ''+'' from battery for some 10 min. And put it back.

pflowers

Ok so this is the pipe that goes in the round thing that sits just above the heat shield?

Krieger

where comes blue tube

addi monster

iTrader: (6)

for me with the rattle it sounds like somthing mechanical has failed which only makes noise with revs, which imho is the turbo, its hard to be exact without hearing/seeing it so i would advise you take it to a scooby specialist and get it plugged in to check the fault codes and have the turbo assessed
im sorry as i dont know anywhere near swansea.

Emmaroids

iTrader: (2)

Sounds like a leaky dump valve and the rattle is maybe the turbo heat shield mate

addi monster

iTrader: (6)

tubbs your on the wrong account

Krieger

Naisss one...

addi monster

iTrader: (6)

OP said hes checked and cleaned dv and theres no probs with it so

Krieger

I was sarcastic :P

tubbytommy

iTrader: (20)

i would say its either the dump valve leaking or the actuator not working, have you checked the actuator linkage???
if its an aftermarket dumpvalve the springs sometimes fail and leak boost just because it looks ok doesn't mean it is.
the heat shields rattle on the turbos when they become loose also the manifold heat shields become loose and rattle.