Car recently started hissing sounds like its the coilpack but i changed that and the plugs around 4 months ago so i don't think its that. I cleaned the throttle body today its not that and i cant see any broken hoses or anything but it doesnt sound like its coming from near any hoses. Should i change the plugs and coilpack again or does anyone know any thing else it could be?? The cart runs fine the only thing I have noticed is when i changed to 2nd and put my foot down it has like 2 little jerks before it goes properly. And also it has a low idle of 500rpm but it has always been like that since i bought it. The idle seems fine though its not lumpy or cutting out.