Exhaust Leak?

[Deep]

I've noticed my car repeatedly makes a quiet dull 'thud' noise at the tailpipe and a slight decrease in torque when I'm letting out the clutch. It idles fine, and tach stays consistant but it sounds like the thuds happens every 2 or 3 seconds. Plugs, wires, cap, rotor are almost new. The plugs read good and the cap has no checking.

Could it be an exhaust leak? Bad cat? Somthing else?

[Ratko]

Bad rings? Knock sensors? Could be pulling timing....

Bad gas? Fuel filter? Dirty injectors?

[Deep]

Gas is good, fuel filter is near new, plugs are good so its not bad rings.

Could be dirty injectors, and if it is knock sensors then there must be a cause. Hmm.

[Ratko]

Well if it was truely an exhaust leak, you'd probably hear more of a ticking sound usually when the engine is under load.

[Deep]

I think ticking would be at idle, not with a load. But its not there, so I dunno know.