1995 Geo Prizm Rattles Under Throttle

1995 GEO PRIZM
153,000 MILES • 4 CYL • 2WD • MANUAL
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RKDRUMMERKID
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When under heavier throttle, usually about half and past, I start to hear a very pronounced metallic sounding rattle from the front left of the car, but it's completely fine when driving easy. Could this be a failing transmission mount, or CV joint? Any thoughts?
Sep 14, 2010 at 9:17 PM
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MMPRINCE4000
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It sounds more like pre-ignition.

Try some high octane gas and see if it goes away.
Sep 15, 2010 at 7:35 AM