2006 toyota tundra sr5 4.0 v6 starting problems

SO i got a 2006 Toyota tundra sr5 4.0 v6 truck never really had problems until i moved to Montana with it .. only when it starts to get really cold truck has starting problems or staying started .. i replaced battery , replaced alternator 2 years ago thought maybe that was the problem decided to take it to Oreilly to get tested and they told me it tested good , they were telling me probley a bad connection somewhere would that possible be it

Replaced serptine belt , battery December 2022

starter replaced august 2020

this really frustrating could anyone help

 

Maybe have the stealership flash the ecu for altitude?? Stealership advised me of this when I took it in for a TSB..

I got mt 5.7 flashed for higher altitude in Reno, NV purchased mine in LA... Didn't have starting issues, but may be an air/fuel ratio issue... Assuming no electrical damage has been done...

 

Is it lugging down or chopping out when you are able to get it started?

 

Should post a thread in the first gen section and you'll get more bites.
https://www.tundras.com/forums/1st-gen-tundras-2000-2006.2/

 

Bad battery cable or ground.