Rattle upon acceleration

I seem to have a rattle on my 05 tacoma access cab while accelerating. It is a 6 speed manual and if I dont give it a lot of gas it seems to have a metal on metal rattle. This only happens when I accelerate slow, If I give it lots of gas I cant hear it, this could be because it is being drowned out by the sound of the motor and exhaust though. It sounds to me like there is a lot of pressure going through the exhaust causing it to shake and rattle onto a near by metal plate.

Has anyone else heard of this problem?

 

yeah I got under the truck and felt around, couldn't feel anything that was loose and any metal shields seem to be out of the way, I am not positive on this though

 

good idea I will give that a go

 

Did you figure out what the rattle was? I have a rattle at about maybe 2500 rpm or so. It sounds like a heat shield rattle would sound like but the entire exhaust and heat shields look ok. Is there a heat shield on these trucks thats known for rattle/vibration problems?

 

Sounds like a heat shield is still suspect , another thing is because of the extreme heat developed inside your CATALYTIC its common to have a heat shield inside a heat shield & maybe a broken tack weld or rivet . bolt.etc; Also check your whole exhaust again from the exhaust flange to the tail pipe , especially where exhaust tubing goes into & comes out of the muffler , Do you have a stock front skid plate ?? Those things sound like your trucks coming apart when they get loose & start vibrating, I dunno, just thinking of places it could be.......

 

Thanks I think I will check the exhaust some more. It does
sound like it's coming from around the cat but nothing is loose.
I do have the skid plate but it's tight since it's been off and
on a lot lately replacing idler pulleys.

 

Do you have a cai?

 

I do have a K&N high flow intake with a cone type filter but it's tight & secure.

 

I am getting this noise too. Had radiator replaced by dealer and then noise started.
Definitely sounds like heat shield/Loud metal vibration at various rpms and idle.

Got under while car was running and making noise and couldn't find any loose heat shields that were rattling... I cannot figure it out.

 

Mine ended up being one of the clamps on one of the cats and the heat shield on it was rattling because the clamp rusted out. I just put a standard exhaust clamp on it and it's been fine.