5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

Car heats up and even misses with A/C on

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Old 05-28-2011, 04:11 PM
  #1  
Quickbird144
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Default Car heats up and even misses with A/C on

Simple thread. I recently got my A/C working and I've noticed with it on, my car will sometimes miss, my temps rise fairly quickly, and also I'll start leaking water from my water pump. My heater core isn't hooked up and it appears the water is leaking from a cap that is where one of the heater core hoses go.

With the A/C off car runs very smooth.

Car is all stock except for exhaust and CAI. I also recently put in a new radiator. What could be the problem?
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Old 05-31-2011, 08:53 PM
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Quickbird144
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Come on guys I know this isn't some rare problem. Anybody have any ideas or causes?
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Old 05-31-2011, 10:08 PM
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5.0Dan
 
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i dont know what to tell you, but mine does the same thing as far as the temp goes. all i know is that its caused by the extra drag on the motor...anyttime its pulling more shes gonna run a litle hotter. as far as the miss....dont know what to tell ya
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