hey guys i have a b20 vtec n am having a problem my rpm goes up n down when am in a complete stop,when i push the gas my car jerks like it wants to turn off like when it reaches around 3 or 4 on my rpm it drives smooth.they told me it could be either my idle censor or the other censor that in back of my intake manifold....so i hope u guys could give me some suggestion on what u thjink is wrong thkz guys

 

if it is your idle air controld valve if you unplug it it should stop if it doesn't it is something else it is in back of the im by the tb there is only one there so it is not hard remember not on the throttlebody but right next to it in the back of the intake manifold.