Motopring

Hey guys. This thing has given me a lot of problems. Started out about 6 months ago. One day it just wouldn't start in a parking lot after driving it to the store. So first thing I thought was fuel pump...which it was. It was changed out and fixed but that's when everything started to "fall apart". Next was it would just stall out of no where. And then try and start again and would ignite. So messed around with fuel pump some more and started looking at electrical. Tried all sort of relays and the ecu. Got a new ecu and reprogrammed it to work. Dealer had to do that. So when I got it back, ran great for about a day. Then it would take about 8 seconds for it turn start. Got it back from the dealer about 2 days ago. I did a simple oil change and filter change also put in a new fuel filter from before.

Now after the oil change and two filters. It did take a while to start again but when I drove it, it drove horrible. Shifting all over, white smoke, revs very inconsistent....help me!
Thank you all