When running off the spring (TIAL EWG) the car will boost fine with no issues. However when i turn on my Profec spec 2 and floor it, under low and high boost settings i get a stuttering. Under Low boost it starts about .7bar but will eventually (sort of) clear the stutter and get to the low setting of .8bar. Under High boost it hits .7bar but won't clear the stutter and get to its setting of 1bar. I'm running Emanage Blue and have only started getting this in the last couple of months. Not the clutch as ive just had one fitted. Any Ideas??? Thanks