ok just wanna check some things , is the nx's idle screw meant to be all the way in, and is there meant to be a spring (cuz mine doesnt have one, should i be able to get a spare one)
problems iam having is that if i let go of the throttle the car stalls , it says in the manual to adjust stuff but not sure how much i should adjust the screw and also when adjusting what should i look for, like is there an visible change that can be seen when tuning.

also just wondering what i should do with fuel spitting out at low speeds or when its gaining speed.... and another question is that what stops the car from going backwards, i rebuilded something and now i cant push the car backwards and it feels jammed?


thx