hello guys, done a bit of searching around and im not sure if its boost surge or flutter? so i thought id start a fresh. recently the car had an airtec intercooler fitted, as it turns out the battery was leaking over one of the older intercoolers causing a hole in it hence the boost leak. see previous posts. how ever, ever since fitting it, as the car builds up boost as normal the gauge needle can be seen heading up to 20 psi (which it normally boost at) but then once its there it flutters up and down incredibly so the needle is just a blur hence the 'flutter' term im using. you can hear it dumping at the equivalent rate of needle flutter, whilst this is happening the car really holds back on power. occasionally it boosts up fine and it runs perfectly. infact it runs very well, and very powerful. so, here is the question. whats do you think could be causing this? (unfortunately i cant do any logs as my laptop only runs whilst on mains power) also, is this bad for the car? (silly question maybe?) obviously trying to stay off boost as much as possible, and that seems fine driving round town, but the car is needed. so no real choice.