Ratting noise - clutch/exhaust?

[myar55]

Hello -

I've got a strange rattling noise (kind of like pennies in a can), that I hear sometimes when I'm accelerating. The car has 85k miles on the stock clutch, which I know is kind of worn (it's been supercharged since 20k miles), but I don't hear any rattling when I'm engaging/disengaging the clutch. The only way I know to reliably replicate the noise is by putting it in second and coasting down the hill on the way to my house. I can't tell where the noise is coming from - middle/rear of the car - it's hard to tell, but there's usually no sound unless I'm either accelerating or engine braking downhill in gear (if I pop the clutch in it will stop).

Any idea what this could be? Any help would be appreciated.

Thanks

 

[myar55]

Just took it out to see if I could find the noise...cold, nothing but after it warmed up almost every time out of the stop sign, and every time I decelerated hard enough that it was engine braking. Also I revved it up in neutral (clutch in) and when it let off, the ratting again - is this sounding like a cat going bad?

 

[HoustonGT]

For your sake, i hope its just a heat shield on a cat or the cat itself and not anything engine related. Rules out the transmission since it does it in neutral, but i dunno. Clutches can chatter alot and i would start with the cheapest alternatives first and work your way up trying to eliminate the noise.

 

[Red2000GT]

I'd check the cat first,just doesn't seem to make sense to be clutch related. Also look for anything loose on the top of the engine.

 

[Jonnypho]

Mine was doing the same thing last summer.

I took it to the ford dealership and they said it was a tin plate in the cat that was making the noise.

they fixed it no cost for me.

 

[00GTpony]

i got the same problem, on my 00 gt. it mostly rattles wen accerating out of second, rolling from a stop sign..

 

[blubullett]

Mine was doing that and my back o2 sensors were hella loose. Didnt think anything so small could cause such a big rattle. Sounded like my xpipe was going to fall off.