Well, I got my car back yesterday and was spraying for hours with no problems. Last night when I armed the NAWZZZ it wouldn't go past 5000. It flies to redline w/o it though. Its very strange. Any ideas? Leaning out? Solenoid?
I left the vafc at stock settings, running low 40's on the fpr.
I retarded my timing the old fashioned way -3*(and did the paper clip trick with the plug). Running 1 step colder plugs with an MSD coil.
If it did the same w/o the n2o I would be very scared but its not!?!?!?

 

I'm having a similar problem..bump..I'd like to know some ideas on what it could be too

 

It feels like I am hitting fuel cutoof at 4800......That pretty much sums it up!
I am thinking something to do with fuel delivery.

 

Mayb you are running to much nos not enough fuel

 

Going to start with resetting the vafc, then checking the fuel solenoid and all fuel lines.