05 STi pls help!!
 

Hey,

I have a 05 STi and am having a few problems, if you know or have any suggestions of what it could be can you let me know???? It is driving me mad!! :confused:

First engine light came on and wouldn't rev of 3 1/2 4 got the computer reset all good just a bit of moister in the air flow meter so all good (this happened in the afternoon of a rainy day)

Second rainy day did it again but no engine light just wouldn't rev over 3-4. Not boosting 1-2nd gear and just lagging big time....but only on the odd occasion, it seems to be very temperamental.. (its doing my head in)

Got air flow meter replaced and still running all over the place and idling all over the place.

help!!!!

Kat. :)

did they reset the ecu when the afm was replaced?

and is the air filter wet still?

Have a workshop check the acutal codes to make sure you are looking in the right area.

Do you have a cold air intake that is mounted too low?

Yeh they reset the ecu when replaced.

nah it dry now, but still running like crap!

afm mounted in engine bay where orginal box was.

Subaru had it for 4 days and it stuffed up the first couple days then ran fine the other so they just replaced air flow..
Still stuffs up!!

Could it be boost control or senes...??

Thanks

o2 sensor??

i know mine is a '97 but i had to change both the AFM and the o2 sensor when mine was running like crap

[QUOTE=kat]Hey,

I have a 05 STi and am having a few problems, if you know or have any suggestions of what it could be can you let me know???? It is driving me mad!! :confused:

First engine light came on and wouldn't rev of 3 1/2 4 got the computer reset all good just a bit of moister in the air flow meter so all good (this happened in the afternoon of a rainy day)

Second rainy day did it again but no engine light just wouldn't rev over 3-4. Not boosting 1-2nd gear and just lagging big time....but only on the odd occasion, it seems to be very temperamental.. (its doing my head in)

Got air flow meter replaced and still running all over the place and idling all over the place.

help!!!!

Kat. :)[/QUOTE]

Sounds to me like you've switched over to the fail safe fuel map. (even so it should still let you freely rev it to redline)

Does the car have mods?

Did people at Subaru tell you what the CEL code was?

'05 STi....still under warranty?
Any mods?

PS write in English so we can fully understand what you're asking....

yeh under warrenty still but they don't know what the problem is!!

no mods just pod filter....

Pod filter would be considered a "mod"

What type of pod filter?

I'm guessing there is a cold air intake going into the guard that is sucking the water up.

idle control valve ?

could be your o2 sensor, AFM or maybe you have a leak on one of the intercooler hoses, just throwing some randoms here, but sounds like an intake problem

If you were sucking in water (trust me mine was doing it) it would get to about peak boost, 4 thousand on my VF34 so about the same on your VF35, and it would jerk violentley. Almost like hitting boost cut or a 'Brick Wall'.

02 sensors would make your car surge during times of hot and cold. Again, i had this problem and when it was cold, it would drive and kind of stutter, it eventuated to when it was hot aswel. Again, doesnt sound like what you are getting. Not being able to idle properly could be ICV (Idle Control Valve).

If it happens when its only rainy, you have pretty much figured out, its a water issue. Sounds weird ;p

Remove pod filter and replace with OE airbox...

[QUOTE=kat]First engine light came on and wouldn't rev of 3 1/2 [/QUOTE]If this is supposed to mean your engine will not rev higher than 3500 RPM while driving - Conclusion - [B]you have a contaminated Air Flow Meter[/B]. Your STi will also not make boost whilst in "Fail Safe" mode with a stuffed AFM either.

Your going to have to replace that Pod Filter with the factory airbox as it appears your AFM is getting contaminated either due to inadequate filtering and/or moisture contamination when it rains.

You are far better putting back the factory airbox back in (minus the resonator - snorkel), fitting a silicon airbox to turbo intake pipe and then getting a reflash tune from the Verso boys.

Ps. Air Flow Meters can be cleaned with a spray can of CRC Contact Cleaner.

J