Engine Cooling Temperature Problem - Mustang Evolution

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Old 11-16-2013, 09:24 PM   #1
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Engine Cooling Temperature Problem

I own a 1995 Mustang GT. I started having an issue with my engine coolant temperature gauge pegging out past the 'H' and the gas needle going from F to E. It was clearly not running hot, I had the A/C on but shut it off once I saw the temp needle pegged out. My radiator apparantly had a small leak that was undetected until driving to work in heavy stop and go traffic in the heat of the day. Once I saw the steam from the driviers side of the engine I immediately pulled over and that is when I discovered the radiator was blown. I have since replace the radiator with an aluminum radiator, thermostat, Blue high temp hoses, fresh coolant and Hy-Per Lube Super Coolant. I have removed all of the air from the system and checked the engine block temp and radiator temp, none of which indicate a high temp as to where the temp needle reads. In fact after changing everything out. The needle pegged out when I crancked the car up a second time after pressuring out any air through the screw type vent on the thermostat housing. I also changed out the ECT on the lower intake. Any help as to how to solve this issue would be greatly appreciated.
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Old 11-16-2013, 10:54 PM   #2
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Sounds like an electrical problem with the instrument cluster.
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Old 11-17-2013, 12:32 AM   #3
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Thanks for the reyply,

I was thinking along the same lines. I am on nights this weekend and off on Monday. I have one that I picked up at a salvage yard that I am going to put in and see what it does. I know that using a pyrometer, my engine temp is doesn't get over 180ish, the radiator ranges somewhere around 130-140 sitting at idle. I have a brand new fan and it kicks on when I turn on the A/C or when the temp gets up to temp and then cools it back down.
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