What is happening with my engine???

I apologize in advance if what I am saying here has already been posted elsewhere...

I noticed the other day with my 22 Tundra (21K miles), that when I start it up, in the morning or any other extended period of sitting time, that when I am driving for about the first 5 minutes, it's like the engine is missing, or very temporarily cutting out, almost like I am taking my foot off the gas abruptly. It slightly shakes the whole truck when it happens. It almost even feels like I pumped the brakes really quick. Then, after about 5-10 minutes, it's fine.

What in the world is happening? Figured I would check here before I run down to my dealer just to get some thoughts. Thank you!

 

Maybe you go bad gas like with water in it. I try not to fill up if it just rain hard. Are you running 93 octane? Fill up with 93 and see if not.

 

I agree with bad gas. It could been a problem. But 93 isn't required for the tundra so its won't help.