maccas1985

Hi guys,
I have got a bit of a problem which is beginning to do my head in.
I have a 2003 focus on ae tuna map.
It also has
Milltek manifold, sports cat and full system
Airtec intercooler
Airtec turbo cooler
Airtec upgraded Radiator
Pumaspeed designed k&n Induction Kit
Forge Actuator running blue spring with direct pressure
Celtic tuning re-map
Magnecor Leads
Full Samco silicone hoses.

The problem i have is that when i am on boost, roughly between 3000rpm and 5000rpm i have a very horrible stutter that feels like a misfire and looses power and the car struggles to pull. Once the misfire clears it then pulls really hard upto the shift light. This happens in most gears.

I do have a problem aswell will it overboosting and the ecu light kicks in all the time and sometimes goes into safe mode, that is the only fault code that comes up. Are these related?

Does anyone know or have heard of this on any other RS's.
Hope someone does
Macca

kevin1987

Hi, i have the same problem. Did u find somethin out?