You need some bigger injectors. 1 bar on those turbos with stock injectors is not good IMO. If you do have bigger injectors than your ecu is more than likely tuned for 18lbs unless you specified other wise with ash. As far as your evc 4 try to completely reset it and start from scratch, that way you know it's good and you get to do a couple 3rd gear pulls too:-) I've never had my evc 4 spike, it shoots to 18 and holds till I let off, check your lines and vacuum filters. Best of luck