My car sputters and the tach jumps around when ever I hit small bumps on the road as I am driving, usually in either 3rd or 4th gear at around 2000 rpms with my foot on the gas just to maintain speed, if I hit 2 or 3 small bumps in a row it will just stall as I am driving and then when I go to start it up it wont start, sometimes the engine light comes on other times it won't but then if you wait like 10mins and give it some gas it will start. I just got back from the dealer and they reinstalled the stage 2 flash and took it for a drive and found no issue,I just left there and it did it to me within 5 mins of driving? any ideas?

 

check your injectors.. make sure they are seated proper

 

could it be a year worth of lead foot driving with a 2.8" pulley? Thats what I hope its not, the tech knows i have an aftermarket pulley.