Down on power L67?

[rcLord510]

My 03 GTP is having a weird issue, had it for about a year now and one day while going 70 I accelerated up to about 75 and it was down on power, burning coolant. So I changed the LIM gakeets(completely forgot to when I got it) and it fixed the coolant consumption but now it struggles under boost and any more throttle than 1/4, I have to feather into it and even then it struggles. On the accel if I do too quickly it makes a nasty sound that sounds blower related, but im not sure, tried plugs, maf sensor cleaned, iat cleaned, and it’s still having the issue, which comes and goes. During scanning, I noticed when it does this, it pulls timing, almost like traction control is sensing slip and removing timing, but I know I’m not slipping, and traction control hasn’t worked on my car since I got it anyways, im out of ideas guys, do any of you have any?