My car in the last few days has been bucking at running like crap at rpms below 2500 ro so. Now i do have a pretty bad exhaust leak that i plan to fix tomorrow right at were the header meets the h-pipe. I plan to fix that tomorrow. It feels like its almost running out of gas, and turning off and on. It is bad when not fully warmed. But after its fully warmed it only does it every so often. Does anyone have any ideas before i start replacing stuff.