Nitrous Surges on Full Bottle, Help

I was using my nitrous for the first time in about 2 months yesterday. My bottle pressure was between 900-950 at the time. I have a Walbro 255lph inline pump, and the bottle had just been filled.
When I hit the gas in second I didn't feel anything that suggested a problem, but 3rd was a diferent story. After the gas had been on for about one second I started to feel a surging or "cutting out" feeling. So I immediately turned off the nitrous.
I'm running NOS 5176, dry kit. 150shot.
Any ideas?

surging is usually a sign of to rich. :)

Now that you say that my car pulls rich codes often. Like every 100-400 miles it randomly throws a pV172 SES.
i think its rich bank 1.
It even throws them when I'm not spraying, what could be causing it to do this?

do you have a FPSS??? I would check that out if you do.

Ignition misfire (plugs, wires, shorts) will cause a bank to run rich... especially under load conditions.

I would like hear how you guys wire up your fpss. This surge thing is worrying me.

what do you mean fpss

fuel pressure XXX XXX
whats the ss stand for?

the tee or regulator or something?

Fuel Pressure Safety Switch.

I do not run a fpss. After this i'm going to get one though.

Originally posted by Revis_Racing
I do not run a fpss. After this i'm going to get one though.

another thread (http://www.ls1.com/forums/showthread.php?s=&postid=3773074#post3773074)