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2002 merc Sable w/3.0 OHV has weird squeak on left side

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There is a weird squeak eminating from the left side (opposite the Serpentine belt). I disappears after going above 1100 rpm.

Also, the idle is rough during warmup and will even shut the engine off while stopped at a light. Once the engine is shut off the restarted, the squeak remains, but the rough idle disappears. 

Car has 100k miles (just rolled over). 2002 Mercury Sable


Thank you in advance.

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Sounds like the camshaft synchronizer. Chirps at idle and low rpm, poor idle and occasional misfire. Buy the more expensive Motorcraft unit, or else you’ll waste your money buying another cheap one in 3 months. 

Edited by Spridget
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