Whenever i get on the gas, (NOT NOS)my car is jerking violently, i just had the car tuned, and i am not throwing any codes.Someone suggested fuel injecters,but i am not sure.
Side Note: i filled my car up at a gas station and all they had for super was 91 octane...

 

Bueller

 

Well an update is in order....today when i was coming back from lunch my engine just STOPPED completely.and i had the clutch pushed in didn't know what to do, and the car mystically turned itself back on, no clutch dumping.....i put octane booster and fuel system cleaner in my car yesterday ,along with a full tank of chevron 93 octane, can ANYONE please help me out with this issue.

 

Fubar o2 sensors are a strong possibility

 

Might wanna check your MAF sensor also.....

 

o2 sensor or fuel pump, maybe a clogged filter. I fouled an o2 sensor and the car would jerk in 6th or at constant rpms. More than likely it is fuel.