Full throttle gives a rattle sound

[jpjeep26uk]

Hi all.
I'm a slow driver but every so often I put my foot to the floor to overtake/boredom.
When it sounds like my second Venturi? Kicks in the car speeds up.
Excellent!
Until......
There appears to be a metallic rattling when I fully open her up coming from inside the cab?
Nothing serious or loud just a high picked rattle?
Any ideas folks?
Thanks!!

 

[dieselearl]

do you still have the cat converter? my guess.

 

[Flyer58]

My heater fan box linkage rattles at a very specific rpm and can be very annoying. I can't lean over while driving to find the exact cause.

 

[jpjeep26uk]

My heater fan box linkage rattles at a very specific rpm and can be very annoying. I can't lean over while driving to find the exact cause.

Good shout. I've got a long and fast drive this afternoon so will take a long stick and prod the heaterbox when the rattle starts. It sounds like a chattering highish pitched sound like a spinning bit of metal clattering with another bit of metal. I'll try to record it or be more precise after this afternoons petrol thrashing drive!

 

[jpjeep26uk]

do you still have the cat converter? my guess.

I do believe so Earl, even though a few sites tell me I don't.
I'm under the Jeep this morning so I'll snap some shots and post them.
I have a strange looking box directly under the cab, sort of a flattened muffler which then goes into a proper looking muffler then straight out the pipe.