can anyone shed any light on the approximately 3000 rpm hesitation/stutter
ever since I have changed my turbo it has been there any ideas have change maf and numerous tuning tweaks, anyone else have this problem I will try the fuel line mods today

any help would be appreciated

__________________
363hp and 499.5nm
gtps03 turbo on 98ron BP
2012 Wrc Blue Wrx Sti R spec (ARGH SPEC)

There have been a few people discussing the stumble that apparently exists on the STIs over on NASIOC.
According to them the only proper fix is to do massive changes to the fuel system (ie fuel rail kit).
Haven't encountered this myself and being NASIOC, might want to take with a pinch of salt.

__________________
2015 Forester XT Premium
2020 VW Tiguan Allspace
teejay: If I wanted a comeback Id wank in front of a fan

Thanks for the link!

G'day Tom,

Does it do it in S# mode only, or also in S mode?

__________________
Bye bye betty blue. Hello F6.

It is the tune,it will be leaning off if you have a wideband fitted you will see it lean off.

Once you add a larger injector such as the 1000cc unit it requires a lot more time to get right.
The later model ECU`s are a lot more complex than from 07 back.
You really need a tuner that is upto date with the current ecu.

__________________
According to Cody front mounts get the bitches!

Its rich not lean according to my aem wideband. After warick tuned mine, its gone.

It happened in all modes btw, Nick.

Here is a very good article from the states, its against lots of common idea in this forum, but I think it worth a read:
http://www.importtuner.com/tech/impp...s_engine_tech/
using the Perth-WRX mobile app

__________________
MY08 STI 422whp at 1.5bar on E85, built by Diversion Garage, assembled and tuned by EvoR

Update from new owner: 375whp at 1.4bar on 98, at Tokyo Motorsport

And are you running larger than stock injectors?
there is a delay with a wideband in the dump pipe so to see what is going on you need to log the stumble , by the time you see it on the widband the rich dip is a result of the stumble not the cause.

__________________
According to Cody front mounts get the bitches!

Stumble has been fixed by the fuel line mod and will be in for a dynotune on today just changing over plugs

__________________
363hp and 499.5nm
gtps03 turbo on 98ron BP
2012 Wrc Blue Wrx Sti R spec (ARGH SPEC)

What fuel line mods?

Cheers.

__________________
Bye bye betty blue. Hello F6.

http://www.iwsti.com/forums/how-inst...e-fix-mod.html

using the Perth-WRX mobile app

__________________
MY08 STI 422whp at 1.5bar on E85, built by Diversion Garage, assembled and tuned by EvoR

Update from new owner: 375whp at 1.4bar on 98, at Tokyo Motorsport