okay, i get it....lol. but the car is still running really rough. like it jerks back and forth gradually. what could course that?

 

jerks back and forth gradually? so, the car is rocking back and forth... like a rocking chair??

just sayin, jerking and gradually just kinda cancel each other out...

 

i just mean it not violent

 

so as if it had a misfire, right?

go through the process and figure out what cylinder it is. unplug each injector individually and see which one doesn't make much, if any, difference when it is unplugged. from there, test for spark. if you have spark, then test for fuel, pull the injector and see if it sprays fuel. then go for compression...

with that said, if the miss doesn't seem to be just one cylinder then it is more than likely a vacuum leak... casually spraying starter/carbcleaner/etc fluid around will help locate the leak.
if you've done all of that, and still can't narrow it down, then check fuel pressure, then start at one end and work your way to another, checking all of the sensors...
good luck