Starts off like that, and what it has turned out to be on my truck is the Gas tank shield......

Toss it, unless you're doing off-road.

 

Look at the heatshield under the drivers side area. This heatshield tends to migrate down the pipe and will start rubbing up against the O2 sensor bung hole. It will seem all tight to the hand, but will vibrate under low RPM. I got like a 2.5" hose clamp from auto store and clamped it down to the exhaust.

 

thats exactly where mine was...right against the secondary O2 sensor... drove me crazy. bent it back with a flat head and now 2 years with no noises. lol

 

Thanks to both. I will check those out. Whatever it is annoying as hell!!

 

Mine does it too. It is the heat shields above the b pipes. Some members buy large hose clamps and clamp them down.

 

Mine does this as well. I was pretty sure on mine its the front brake shields.

 

I'm having exact same noise. I'll check it this week. Good thread!

 

Probably a head shield, they may appear tight but one broken weld and you can get a rattle, I have used hose clamps to tighten them down, does the trick.

 

It was the heat shield touching the O2 sensors. Both sides. Bumped them forward so they weren't touching, BAMM, no more rattle!!!
Thank you TT! You guys rock!

 

Glad I could help! That sh!t was driving me nuts for almost a year before I found it. It may end up sliding down again, so look into those little hose clamps to tighten it down.

 

I def will get those clamps but for now I'm a sane man in a T! Thanks again!

 

yeah one of my heat shields was doing that too and it sounded horrible when i was driving by buildings and the concrete dividers and stuff on the highway lol. i just used the hose clamp and it went away now its back somewhere up front so i need to check all the different stuff you guys mentioned.

 

Dude! I literally just fixed mine this morning. The 3 clamps may be overkill but atleast it doesnt rattle anymore.

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