alright so my car kinda feels like its running cruddy

like it doesnt feel like its at its full potential

1 problem is

when i step on it it will jerk some times like a small jerk
and my car idles weird as hell
my car shacks alittle when it idles

any ideas??

my friend told me its probably the tune

 

have you checked your plugs? Have the right plugs installed? Fill up with the wrong gas? what do your AFR look like? what EMS/Tune are you using?