4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

Overheating

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Old Oct 26, 2010 | 03:21 PM
  #1  
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Default Overheating

my car was over heating so i took the thermostat out and now it runs cool, very cool but only when in motion, if I sit in city traffic it still gets hot and eventually over heats. Coolant level is fine. I under stand why it runs cold when in motion, (wind hits fins) but why is still getting hot when at idle?




Have not checked the fan yet nor inspected the water pump. Going out the door to do that now.

Last edited by SXGT; Oct 26, 2010 at 03:26 PM.
Old Oct 26, 2010 | 03:32 PM
  #2  
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water pump, fan not running right, radiator being over 10years old... might be time for a cooling system overhaul.
Old Oct 26, 2010 | 03:50 PM
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pretty sure if your water pump was out your car would still overheat while driving, infact it would be even worse?

sounds like your fan isnt kicking on honestly. that seems to be the most logical reason for why its fine while moving, but not at idle...

start your car and let it run for a few minutes and see if the fan ever kicks on (make sure your checking back and forth between the fan and the temp guage so you dont overheat)
Old Oct 26, 2010 | 05:32 PM
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I had the same issue and it was fan.
Old Oct 26, 2010 | 07:43 PM
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check your relays.
Old Oct 26, 2010 | 07:51 PM
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Originally Posted by MU71L4710N
pretty sure if your water pump was out your car would still overheat while driving, infact it would be even worse?

sounds like your fan isnt kicking on honestly. that seems to be the most logical reason for why its fine while moving, but not at idle...

start your car and let it run for a few minutes and see if the fan ever kicks on (make sure your checking back and forth between the fan and the temp guage so you dont overheat)

yes... it would overheat like a mothervckvker when ran..... Car probably is overheating from the heat the flaming purple heart tatoo'd on your chest is giving off.... yeah that pic was brought up in OT the other day.

.

As stated probably the fan.
Old Oct 26, 2010 | 08:01 PM
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it may be your coolant temperature sensors. Since there are two on the npi's one controls the fan relay and one controls the gauge. If you're gauge is working fine try switch the sensors and see if the gauge works the same. on both sensors while idling, if not then you have a sensor issue.
Old Oct 26, 2010 | 08:16 PM
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oh i should add, if the coolant has been changed recetnly, the system needs burped, if not, it will overheat, but doesn't seem like the case in this scenario as it would most likeley overheat during driving.
Old Oct 27, 2010 | 05:24 AM
  #9  
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More than likley the electric fan, this is very easy to check.
Old Oct 31, 2010 | 06:25 PM
  #10  
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fan was not on. but is it off until it hits X temperature, should it always be on. Its deff OFF


as for my Tattoo, I ahve two new ones but I was removed from the Off topic after I complained about a mod harrasing. thats right folks, the admins will simply ban you from OT if you complain about staff harassing you.



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