nah man i had exactly the same thing, everyone told me it was boost cut, even myself thought it was boost cut untill i wondered why it would pop and bang after it did it as tho there was an excess of fuel not leaning out likeboost/fuel cut, then it slowly got worse but it is like hitting a brick wall, coilpacks fixed mine aswell, i think boost cut is like 16psi or sumthn on these isnt it? you should be able to run 14psi as far as i know, just something to look into anyways, Ben