Well i got a code 27 yesterday so i check all my injector wires all fine all light up so i feel the injectors to see if i feel them working and cyclinglike there soppossed to well there were a couple that were week so i figured id do the sea foam trick put some in my tank sucked some into my brake booster hose turned off let sit 5,10 minutes fired it up smoked alot but now driving this thing down the road is like riding a prize rodeo bull bucking like an ol mule man what is up with that!

 

The sea foam probably loosen up some of the carbon deposits in the intake system. Those deposits could have gotten onto the spark plug electrodes and are preventing a spark. Pull the plugs, clean and gap them and the bucking will likely disappear.