Well, I've been having fun in the car since I got it back from remap with Andy F. Nothing extreme, just pottering around and listening to the funky sounds. But its about time I get to a little problem I think. I have one now, which unfortunatey could mean a number of possible things which you guys might know more about than me. I noticed it the other day first, when I took my mate out. I turned off a roundabout onto a 60mph zone and put my foot down in 2nd gear. Within a few moments it felt like the car had hit the limiter and kicked me back, but I knew I was no where near the rev limit. Nevertheless, I changed up a gear and foot down, all was fine. 4th gear, spot on, 5th, same. Amazing speed Again, with the car fully warmed up again, I pulled away from a junction and put my foot down and it did the same again, seemed to boost then hit the invisible limiter! Changed up a gear and it was ok. Slightly sluggish for a second but then fine. Went for some food a day or so ago with the missus, and although I wasnt giving it some welly, it felt like there was too much air trying to get through the exhaust and it was hesitating, and when I did put my foot down it was like I was forcing the air through so I could get some speed up. The exhaust pops when it does it too. The latter (lag I believe) is like how it is on some mornings in her Evo when its cold. Foot to the floor and its slowly building up revs before spinning into life. Now again earlier today, just less than 1/4 tank again and I turned left at a junction, put my foot down in 2nd and got to about 1.3bar boost before it shuddered again. I quickly changed to 3rd and through to 5th accelerating hard, was spot on boost and pull. Its random and doesnt happen all the time, but like most things, its annoying. Now, I've read a lot of posts on various forums and come up with a few things : MAF failing - dunno if its the right symptoms to be honest. Overboosting - again, could be? I think Andy set it to 1.3bar and its peaking at just over 1.5 at the moment due to the weather. Spark plugs - also changed them recently to top NGKs Leads? Boost solenoid? Coil packs? ...and the main problem, which I think it is : Fuel Starvation - as the car has less than 1/4 tank petrol in whenever this situation arises. However, is this a myth or does it actually happen? I've got an uprated fuel pump on and before the remap it never hesitated, even with the petrol light on. Will the remap, mods including Apexi ECU and fuel pump contribute to the starvation problem? Could be something else? Any tech bods have any handy tips or advice? Might be nothing, but I wouldnt want to risk anything Cheers guys! Its an Impreza P1 by the way. Front Mount intercooler, decat exhaust system and Apexi mapped, AP clutch, Walbro fuel pump, K&N 57i etc.