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2009 Mercury Sable Base 4dr Sedan FWD

2009 Mercury Sable
Trim Info:
Front Wheel Drive, 4 Door Sedan, Large
18 mpg city / 28 mpg hwy
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February 11, 2012, 4:31 pm

AutomotiveForums M

Question: Engine temp fluctuates

My 2002 3.0 L Sable will warm up but once it acheives a normal operating temp. the temp. will drop back off back to cold as the its driven and the RPM's increase up or the heater blower is on then slowly climb again. I have recently installed a new thermostat, the coolant system has been flushed, and the heatercore is fairly new. I have resorted to installing a piece of cardboard to resrict airflow to keep the temp. up but no luck. Any Idea's?


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