Starting/running major issue?
 

I have a 98 dodge 12 valve with 500,000km I have replaced fuel filter,lift pump,rpm sensor,it will start by ether and only if i hold pedal to floor, it barely idles and after about 3 mins to the floor it will start to pick up in speed and eventually I can let pedal go and it idles without any issues! Leave it idling and smokes really bad and when I put into gear it will not go anywhere but make a lot of noise,put it back into gear and can rev it up like crazy! Put it back in gear and nothing sounds like air getting into injectors and it makes that pinging kinda noise. And all I did to the engine was repaired the KDP and changed water pump out while in there. Put it all together and truck has not ran since! Up to that point because of an oil leak and the KDP this truck gave me not a single issue ran like a million bucks! I really need help!!

Did you crack lines at injectors to check for air.

Yes I have it's like there is too much fuel so much that I have it coming out the tail pipe would stuck injectors give the same symptoms?