I started to hear a rattling/banging noise under the car some weeks ago and the car has now started making a rather loise hissing noise when accelerating (not idling). The car has a distinct lack of power and sounds almost as loud as a Subaru.
I intially thought so as well, however I've been under the car and it's all secure and shows no sign of deterioration. The hissing sound is actually coming from the front (sorry, my post was not clear) whilst the rattling remains underneath.
this can also be caused by a clogged cat converter.... if its coming from the front check the bank 1 or it could be the inline converter, these cars have 3 1 for cyl 1-3 and one for 4-6 then one inline right below the firewall. on the 4 cyl the cat is right up front and big.
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