Causes of Jittery Boost Gauge/Slow Turbo Spool?

[NeWyoRksPLaYaZ]

As I am driving home from work in this wonderful weather in NY, I notice my boost gauge (while in vaccum) seems to be jittery. While coming back to idle it kinda jumps going from 18-20 in vac. Also I went wot and at 11 psi I felt the car bog a little, the feeling where its like I hit the brakes but I didnt. I also noticed that the spool time was greatly increased It really took forever to get the turbo spooled when it normally doesnt take nearly as long. Also wb sensor died and is showing completely lean 24/7 so I cant even tell if I ran lean when I attempted my wot. My latest mod was a hall MBC which I installed 3 days ago but it didnt feel like this. Maybe my car doesnt like the rain


I made a video but for some reason on youtube the sound is delayed a bit. at the very end of the vid while I freely rev it while standing you can see the boost gauge kind of jump down

Jittery boost gauge..causes? - YouTube

 

[jpmxrider489]

Thats a lot of vacume. I would do a boost leak test.

 

[NeWyoRksPLaYaZ]

Thats a lot of vacume. I would do a boost leak test.

What does yours normally read at vac? I thought this was a normal vaccum reading?

 

[jpmxrider489]

Mine is between 14-17. To be honest I dont know what "normal" is. But I would do a boost leak test to make sure. Then you can rule that out.

 

[blkgst97]

Mine is between 14-17. To be honest I dont know what "normal" is. But I would do a boost leak test to make sure. Then you can rule that out.

Do you have cams? That seems a tad low if you dont. Also timing being off a tooth I believe can effect vacuum.