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On my 03 GT convertable it makes a rattling noise coming from the bottom of the car everytime I accelerate.
Tap the gas, it starts rattling till I let off of the gas pedal. ANYHELP?
"Bottom of the car" is a pretty big area, care to narrow it down a little? Does the rattling sound seem like it's coming from the transmission, exhaust, front or rear of the car?
Do you run 93 octane ? If not it might be spark knock, my 95 5.0 was bad about this when I bumped timing up. Only did it on acceleration. Sounded like an exhaust rattle.
There really isn't enough information here to pinpoint, is it only under heavy acceleration ? Could be loose exhaust like posted here, Rod knock, spark knock , cat converters falling apart, loose driveshaft bolts, bad u joints, the list goes on.