Hi..2017 Toyota tundra,43lmikes.5.7engine. Start tough in cold weather, like sn old car with a rough choke. Lasts bout 5 seconds then kicks in n roars like a lion. Some blueish white smoke,only lasts a few seconds.mechanic said battery read bad n put a new one in....did same thing day after I got it bk with new battery...help?? Thnks!