I've had this problem with my 2000 Sable with the vulcan for a while but it has gotten worse lately. There is a rattling coming from the lower part of the engine on the passengers side. It sounds like its just behind the glove box. It makes my engine sound awful I hate this sound and I have no idea what it is. The car doesn't have to be under heavy acceleration, it just always happens at around 4k rpm. Any ideas?
I've had this problem with my 2000 Sable with the vulcan for a while but it has gotten worse lately. There is a rattling coming from the lower part of the engine on the passengers side. It sounds like its just behind the glove box. It makes my engine sound awful I hate this sound and I have no idea what it is. The car doesn't have to be under heavy acceleration, it just always happens at around 4k rpm. Any ideas?[/b]
Does it happen when you're at high load, too? Check your front right motor mount (which would actually be the pass. side rear) If it's busted, your motor could be popping up to the point that it's putting tension on your ground strap to your firewall, allowing vibrations to pass through to the cabin. Also, could be an exhaust leak out of your rear manifold.
My 2000 Taurus is doing this too... mine varies with engine load.
There is a sweet spot, and I can vary the throttle and have it rattle more or less. Doesn't make any noise at idle or full load - just at mid throttle at lower speeds like 35 - 65.
If I didn't know better I'd say it was a specific engine knock from one cylinder but it's not quite the same - kinda like marbles rolling around in a cage.
My 2000 Taurus is doing this too... mine varies with engine load.
There is a sweet spot, and I can vary the throttle and have it rattle more or less. Doesn't make any noise at idle or full load - just at mid throttle at lower speeds like 35 - 65.
If I didn't know better I'd say it was a specific engine knock from one cylinder but it's not quite the same - kinda like marbles rolling around in a cage.
Sounds like it could be ping related to pre-ignition. I would check the pcv valve and hose for leaks. Does the problem get worse when it gets hot/humid outside? Does it make any noise at idle?
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