at idle it seems perfectly fine. when im driving it, it starts to stumble and hesitate...it gets pretty bad and it frequently shuts off when im either in neutral or engaging the clutch...
i took a look at my ecu and its giving me 1 long flash and 2 short flashes, idk how to read ecu's.

yesterday it wouldnt even start...i had to push start it and it hesitated.

 

the long flash is 10 and the short one's are 1's. So you have a 12. It's you (EGR) EXHAUST GAS RECIRULATION SYSTEM. LOOK IN TO THAT .

 

Easy easy fix.