I have a 06 wrx 5spd w/ cobb stage1/SPT catback/ SPT CAI and have been dealing w/ a surging since day 1 whenever I accelerate w/ anything other then WOT. It got better w/ the 93 oct stage 1 and catback but now has gotten worse w/ the SPT cold air intake. It is most noticable in first gear anywhere from 2200 to 4500 rpms and happens at points thru the rpm range and also happens at low rpms in 2nd gear. I know this will happen w/ the air compressor on but this is w/o the compressor running and happens every 2 to 3 1st gear takeoffs or 2nd gear pulls. Is this in any way a boost creep issue and/or something different. I have read about the ground mod but this seems to be a early model issue and I already have taken ohm readings from different points on the motor/batt/manifold/chassis etc and that doesn't seem to warrant a concern but I'm willing to try the mod anyway.
If anyone has the same or similar problems w/ this please reply as I really want to resolve this. Thank you