Fuel cut symptom

Ok i am have the symptom of a fuel cut. I can get through 1st gear all the way then in 2nd around 5k it kinda cuts of for a split second and then it will keep going up in rpms with the cut off every second or so. And in 3rd 4th and 5th it does the same thing but it starts at about 3-4k. But if i hold the throttle about 1/4 of the way down it will go smooth through all  the gears.  I am pretty sure there is no fuel cut going on tho. I am running 15 psi on stock injectors and a walbro 190 fuel pump and i have an adujustable fpr. There are new NGK plugs gapped at .28 new wires new fuel filter. I am thinking it has to be a vaccume problem or something. My vac guage says about 16 and idle and goes to 20 if i rev to about 2k and let off gas then fall back to 15-16. Some times it is at 12 depending on my idle. The least owner of my car kinda F'd up my vac lines. I'm pretty sure the pvc vavle is not hooked up. look at this pic, The pvc line looks like it is going to the catch tank.

Yes it is connected to the catch can and that is fine. Thats what the catch can is for. To take deposits from the PVC valve and Breather hose. But it definetly sounds like you have a boost leak somewhere. Or a vaccuum hose that is loose. Do you get a CEL while its doing this

The CEL is on but its a O2 sen. There is no boost leak i had a bunch of work done to fix my boost leaks. And its still hold boost perfectly, So the only thing i can think of is a vac leak or a line hooked up wrong.

*clears throat*
 
Uhhum...
 
PCV vavle.... not PVC valve.

lol
 

haha, oops. I always do that, because when i spec plans im always using PVC pipe so its just natural for me to right that.

i'd go over it and just double check the vac lines... if you don't find anything i'd check all your couplers and IC piping for a leak.

So when was the last time you changed out the spark plug wires. Id say that could be the culprit