SlammedChevy2000

I recently did a swap on my v6 Chevy to a 6.0, when I had everything settled up the engine service light went on, then I hooked on a code reader and gave me these 3 codes, P0357,P0352,P0351,the engine is running roughly and the performance isn’t that good,I know it’s not a bad coil cause I swapped them out, do someone have an idea of what’s causing the issue????or where can I start to diagnose the problem????

G Atsma

If you know your coils are all good, check all ground connections.