00' Tacoma 3.4l High Speed Ping/Rattling

When I'm traveling anywhere from 65-80mph, if I have the gas peddle pressed down enough to MAINTAIN speed it will make that noise. If I coast (0% throttle), or go full throttle, the engine runs flawless.

Replaced spark plugs, wires, switched around coils, did plenty of Sea foams and fuel treatments, replaced injectors. What do you guys believe could be the issue? If I'm missing something just let me know.

 

Greased the driveshaft u joints, lately?

 

NO WAY COULD IT BE? I could swear on my life it is an engine sound, but all advice it taken into serious consideration. So I will go out tomorrow and get me a grease gun and grease up my baby. Should I look around here to see if I find info on where grease fittings are, or could you lend a hand?

 

There's a sticky in 1st Gen section. Just did mine 2 weeks ago.

 

Is the MIL on? Is it pinging in the engine bay? You don't feel it at all right? Just hear it? If MIL is on, might be within reason to think it's from a lean condition. You have one of those obd2 Bluetooth readers?

 

What is MIL? Yes, pinging is from the engine bay area. I don't feel a thing, other than regular road. No OBD2 BT Reader,may end up getting one though.

 

Malfunction indicator lamp, just what Toyota calls the cel. I've just gotten used to calling it that, my bad.

 

Don't bet your life. I'll wait