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'93 945t
Over the past few months, I've noticed a weird noise whenever I'm at around 2,000 rpm and I back off the accellerator. As the RPMs drop, I hear this rattling sound, which subsides as (I presume), the general engine noise drops. Sometimes I can hear it slightly through the sound of the engine at a constant 2,000 rpm - but at lower and higher RPMs, it's not there. It definitely seems to be coming from the engine - not the exhaust or transmission, and only when in gear - if I rev the engine at a stop, I can't hear it at all.
Is this most likely just an "older car" quirky sound, or might it be valves or possibly signs of turbo failure around the corner? (seems to be coming more from the passenger side of the car, where the turbo is). Car still drives very well at 175k. Might anyone have experienced similar sounds?
Thanks for any input,
Ben
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