Ive been using my SCT for about 2 months now and I just got a custom tune a few weeks ago. My SCT has canned tunes that I was running (street perfromance). I didnt notice this problem im having untill I got my custom tune. Heres my problem.. When accelerating from a stop going about half throttle and maybe about 20psi of boost I get up to 50-60mph, then I ease of the throttle and hold 55mph or there abouts. When im holding this speed my boost psi on my gauge will just drop to 0 and hold it. Its like there is a switch for the turbo to shut it off and it was just shut off. So im still holding the gas pedal to keep me at around 55mph and if I give it more gas to speed up my boost will stay at zero like its in vacume and i just start to roal coal out my exhaust because Im not burning the fuel because I have zero boost. If I keep pushing the gas pedal to the floor I will just start blowing more smoke and my boost dont move from zero. Now If i go WOT it will roal coal for a sec then the boost will finally kick in like something was holding it back.
I dont ever notice my boost sticking in any other situation. When driving around from stop light to stop light and getting on it hard my boost never sticks or overboosts.
I talked to the guy who did my tune and had him change it thinking it may be that but i notice no change. He thinks its my turbo sticking.
To be honest i dont think it is the tune but I think the tune may be bringing out a weakness in something.. I dont know... It dont seem like a sticking turbo since it only does it when that situation of getting up to highway speeds and holding speed.
Any ideas? Maybe my turbo is just now starting to stick and this is the first signs of it?