D16 having issues

So, I’ve been having issues with this motor and getting it started. Replaced the fuel pump, distributor, and the throttle body along with map and tps sensor. I don’t know what’s going on. I think it’s fuel related but still don’t really understand. I also don’t know why smoke was coming out from the head. It did smell like gas and the plugs were fouled after not even 50 miles of driving.

Could someone offer me some help or advice or even just a second opinion on what you think it could be, I’m still fairly new cars so my knowledge has reached its limits on this one. Pm or just reply

Thanks