i fix the idle by adjusting the screw located on the throttle body now it idles perfect and when i start my car first thing in the morning it seems to be fine now but the car still jerks like it's not getting enough gas or spark while decelerating randomly, and it's not getting any better and it's not getting worst,today i cleaned the throttle body with some cleaner and greased up the throttle cable, i noticed that it idled a bit higher than normal but car still jerks randomly while decelerating. i don't know what's wrong but i need your suggestions if i'm gonna change some parts what would you guys think will be good to do first,change the distributor? or fuel pump and main relay? for all the symptoms i posted here which parts(s) will be the best solution for this problem thanks.