75 shot...every time I go to spray the car makes a popping sound kind of like its backfiring...whats the deal here...is it my crappy small town folk 90 gas??

 

Ok,,,full mod list. Is it tuned? What kind of kit? What brand? What bottle psi? What exact jets? Window switch? And every other detail about your set up...then we can help

 

sig shows all mods. its a dynotune wet kit with 024 on the fuel jet (i think) and 042 on the nitrous jet (once again..99% sure)...bottle psi was about 900 when i tested..no window switch or anything just manual on and off with a TPS switch on the throttle body

 

oh and its got an sct chip from american muscle thats tuned for a 100 shot...could that be the problem...do i have more retardation than i need?

 

I can't see sigs on my phone...post the info up and ill be able to help...and what plugs? How old are they and when was ur last tune up?

 

SIG:
"
1998 Mustang GT
*BBK shorty headers
*BBK offroad x pipe
*Flowmaster 40's
*FRPP 3.73 gears
*(coming soon) 70MM TB and Zex 100 shot.
"

 

wow you are being way too vague. It's going to be impossible to diagnose like this, I'd suggest bringing it to a competent tuner.

 

try to take a video of it

...unless you're like me. haha, but in all seriousness, if you have a video, definitely post it, but I'm not sure I'd chance another run on nitrous if there's danger of serious damage.

 

Save up some cash for a dyno tune. It might just be your not running high enough octane gas, or your tune sucks, or a bunch of other things. If you take the car to a tuner for a dyno tune, assuming they don't suck *** and you are up front and honest with the car's issues, they should be able to get it running just right with no BS.

 

OP, the tune might be messing you up. If I were you I would run the 75 shot on 91 or 93 octane if possible and make sure the tune you have doesn't mess with the factory global spark. If it does, I would have whoever tuned it for you to adjust the tune making sure the global spark is factory, no advancing or retarding of the timing and using the stock heat range plug. Then you should be good to go. If that doesn't fix it you have other problems lol