Weird boost cutoff problem ... happens sporatically
 

Um .. so yuea i have an s4 t2 swap in my 88 vert.

Anyway from time to time .. not very often .. my car will not feel like its hitting a brick wall, but it s a similar feeling .. the car just wont increase in speed .. like its stuck at that rpm.

This happens most often at 3/4-WOT. The weird thing is that it doesnt happen at just one specific rpm ... it happens at random RPM in random gears (usually 1/2/3).

I have a fuel cut defencer but my car is only seeing max boost of 5.5 pounds. The only mods I have on my car are the streetport and racing beat turboback exhaust. Each time this happens its at aroudn 4.5-5psi.

Does it sound like im running out of fuel? (I dont know how ...) Maybe a vacuum leak?

What do you think