*Title change Would my ECU need tuning by putting a 2010 3v into my 2008 Bullitt? DETAILS BELOW I just finished replacing the engine in my 08 Bullitt....swapped it with a 2010 low miles. Starts up fine but runs rough....sounds like a cammed car at idle. Here are the facts: 2010 engine in 2008 bullitt - stock engine besides deleted charge motion plates and catless x pipe. There are no codes besides the after cat o2 sensors, which are unplugged. The engine runs rough, like it's cammed. It lopes at idle. It's extremely rich smelling. Driving it feels like it's down at least a cylinder. The misfires don't seem like a dead hole, but misfires across all the cylinders. As far as I know the injectors are the same, the 08's were black, these 2010's are pink. The research I did said they are the same, please let me know otherwise. I listened with a stethoscope to the injectors, they are all firing. I am at a loss on what to do. Please help!