2002 Frontier S/C boost gauge problems

[moyea]

I recently installed a boost gauge on my supercharged frontier. I wasn't too sure about where to tap into boost/vac source but I thought I had found one. The gauge read vac and boosted to about 5-6 psi on my way to work.

After work though, I couldn't get the damn thing to boost past 2-3psi and on top off that its off zero. Sounds like the gauge broke but I'm not convinced that's the case. Maybe the car got thrown into a safe mode of sorts (possible leak or such).

Any suggestions would be helpful.

[tcowan]

i have the same truck what gauge and pillar dd you go with

[Rev_D21]

Best place for tapping vacuum is after the throttle butterfly plate.

[moyea]

I need a visual, you got any pics of how you tapped for boost?

I went with the Lotek Inc. gauge pod (2pod pillar).

I also found that its got a bad knock sensor which is limiting my boost.

[MY1PATH]

Bringing up the dead, What did the gauge read once you got everything fixed?
Is 6psi the stock boost for the vg33er?
I'll be adding this SC to a ~10:1 engine so I'd like to know if I need to turn it down or not. (6 should be safe)
I like to tee vacuum/boost gauges with the Fuel Pressure Regulator because it uses real time boost/vac feedback to vary the fuel pressure.