my friend had put a new oil pump on my b16a everything was at TDC and my car sound like it stumbles. my friend took the spark plug wires one by one to see if their was a difference, but it sounded the same. we took off the spark plugs and they were black, i had bought these plug like two day ago, now i try to start the car, but it does not want to start so what i did was try to put it to TDC and it start but i turn it off quick i don't want to make it worst?

 

anybody?