my lt1 will idle good untill you put it under load cold or hot then it will start bucking. problem usully isnt notaciable untill a block from my house.doesnt clear up with more throddle have to just coast it home to keep it from doing it but not noticeable at idle.

IDEAS???
new wires new cap and rotor new plugs

 

First check your plugs and wires. Make sure that the wires aren't arcing to the exhaust or burnt to them. lol.

then go from there.....

next i would check the o2's.

 

would o2s cause this problems

 

I doubt O2's will cause that. Certainly check your plugs and wires first. Even if your wires dont look bad, doesnt mean that there good. Put a multimeter on them and check them for the ohm reading.