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V6 (1994-2004) Mustangs Technical discussions on the 3.8L and 3.9L V6 torque monsters
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Old 04-12-2009, 06:49 PM   #1
pizon
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Vehicle: 1997 Mustang Coupe
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Default Temperature Gauge Fluctuation

What could cause my temperature gauge to fluctuate between normal and hot if my my RPMs and speed are in sync? I've also noticed my heater will blow cold air at times. Thermostat, radiator?
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Old 04-13-2009, 08:47 AM   #2
bgnn32
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I would start with the thermostat, could be the cause of the problems you listed.
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Old 04-14-2009, 01:18 PM   #3
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having the same problem, tried bleeding the cooling system worked for awhile but now car oveheats and heater blows cold air. wonder if i need a new radiator
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Old 04-14-2009, 01:27 PM   #4
bgnn32
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Have you replaced the Thermostat?

Radiator failures are rare unless you punctured it or something similar.
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Old 04-14-2009, 01:27 PM
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1994, 1995, 2004, 39, bleeding, fluctuates, ford, gauge, gt, guage, mustang, replacementand, temperature, thermostat, v6

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