My truck did something weird upon starting today.

I opened my passenger door and reached over to start my truck and when I cranked it, it hesitated almost like a misfire and a bit of blueish smoke came out of the exhaust. After 3-5 seconds it was gone and ran normal and continued to start and run normal all day. Any opinions on what that could have been?

 

Water/condensation in gas? Watch for codes and keep an eye on your mpg's if no other obvious symptoms.

 

^My thoughts as well.

 

I was thinking that too. No codes yet but my gas milage has gone down like crazy. From 16 to about 13-14 BUT thats only after i went to a 285/75 tire. So im not sure if thats the problem or not.