hi lads n lassies, just reading another thread on boost issues and this was mentioned, is this true? on part throttle in 2nd gear for a few seconds will give half boost when floored, i have to say Ive noticed a lack of power in 2nd on occasion is this my prob, i do tend to hang onto a gear a little b4 making my move.. just trying to confiem what this is?

cheers Fergal

 

I read somewhere that the only way Subaru could get the impreza to pass sound emission tests was to cut the boost when held at constant throttle. So it could be your ECU thinking its being tested when your holding onto the gear before you make your move.

 

Cheers Bruce, is there any way around it? or is an adjustment in my driving style needed....

thx again

Fergal

 

Just don't hold it on part throttle for too long in 2nd before overtaking. A quick lift off and then reapply results in full boost but don't do this on a corner.

 

cheers too John B, thats put my mind at rest

 

...or fit a Dawes

 

Just out of interest, which model years fall prey to this quirk?

 

My 99 gets it all the time - a real pain. Stuck behind a van at 35...pull out to overtake...nail it...where's my turbo gone ?

When I get round to it, I'll remove the check from the code, so you get the problem removed as part of an EcuTek remap.

Cheers

Steve

 

Yes, don't lose sleep over it. Its a "feature" of the ECU.
I could get it to occur at will in my ex MY00 GC.

Essentially, the noise emissions test requires the car to be driven at a steady 50kmh in gear 2 or 3 (depending on # of gears, max power etc). In the Rex, its gear 2. Once the start line is approached at 50kmh, the throttle is opened as quickly as possible to the max. The sound measuring equipment is positioned some distance down the road by the side.

I guess the Subaru engineers figured that instead of strangling the car to silence it, they would build this feature in. I would ammend my driving style to gradually open the throttle instead of flooring it. You lose no time, and still get max boost instead of 0.5bar.

Hope this helps.