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Have a 1994 mustang that is running hot when sitting still but goes back to normal when driving. The fan is working. Do you know what it could be.

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A likely source would be the waterpump. Cars run hotter when parked than running to begin with but if you're car is running too hot (on verge of overheating) it's a sign that your waterpump may be on its way out. You may hear whining under the hood when in park as well, another symptom of the waterpump malfunctioning.
Best of luck.

Posted on Jun 19, 2009

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The radiator sounds like it may have some plugged areas

Posted on Jun 19, 2009

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You can check the fan clutch. located on the fan, check the front for leaks it should be dry

Posted on Jun 20, 2009

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My 2007 nissan quest is running hot when I sit at a light after hauling heavy loads or driving too long but once I start moving the temp gauge goes back to normal there is not fluid leaking check back

Check and make sure your fans are working. There's either one or two Black plastic fans mounted on your radiator make sure they are operating. They should come on if you set and let the car idle when it starts getting too hot the computer will turn the fans on, but the computer relies on the temperature sending unit if it isn't working properly, it will not turn the fans on. But most the time and the fans are working at either the fan itself or the fan relay. Hope this helps

Oct 03, 2014 | 2007 Nissan Quest 3.5 Minivan

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Car runs hot after being driven for awhile while sitting idle but only after it has been turned off then turned back on shortly after driving.

Have you checked your engine coolant level? It may be as simple as that, or it could be more complicated. Have you changed your serpentine belt recently? Is/are the radiator cooling fan(s) coming on when the engine heats up? If engine is hot and you turn it off, do the radiator cooling fans continue to run for a period of time? Several possibile problems and solutions here. Need more info please.

Sep 30, 2013 | 1994 Honda Accord

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When 90 Mustang 5.0 sits at idle for a period of time it then runs hot. I replaced stat and I noticed the fan wasnt coming on. Where do I go from here?

check fuses first, if all are good check for power at fan, if power is at fan and its not coming on replace fan, if no power replace coolant temperature sensor and recheck power at fan. the coolant sensor sends a signal to the computer to tell it to turn the fan on so if your getting power at the fan and its not working i would change the sensor, i hope this helps

Feb 05, 2011 | 1990 Ford Mustang

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My 1998 ford taurus get super super hot when i am sitting at a signal, once i start the car moving again the temp goes back down to normal. or if i am sitting in driveway after car has warmed up it gets to...

First thing to check is if your cooling fan(s) at radiator is working. Sounds like may not be, and as for the fluid leak, if it's coolant, it may be from overheating while sitting idling. Get that fan checked first and once that's cured, the leak, (if coolant) may disappear as well.

Nov 03, 2010 | Ford Taurus Cars & Trucks

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My 94 camaro is running hot at idle and while driving under 50. how do i know if my fan is working or what the problem may be?

The raditor may be only partly filled or stopped up. once running and warm if you touch the raditor it should be hot about the same all over. if the top part is hot and the bottm is cold then the raditor is stopped up. with the readitor removed and the hoses removed and a good high pressure water hose you might be able to wash it out good enough to get most of it working, don't forget to wash out the fins where the air goes though. a little soap in some sparyed on water and then reinise off good gets the dirt and bug juice off and it'll cool much better If a car comes into my shop and the raditor is more then 5 yeares since it was flushed and it appears to be partly stopped up i recomend it to be replaced. The fan should come on if you turn the aircomnditioner on, and if you let the car sit and run with the hood open it should also come on as the temperture gauge approches the red zone. it should stay on till the gauge is almost down to the middle. it shpuldn't take but a mintue with it just sitting there ideling to cool bach down with the fan running, Is the check engine light on? If it is the codes may indicate a fan relay problem or a overheating problem and you need to follow the rules for fixing those codes. Mixture control problems( codes ) can point out problems with overheating too.

Oct 13, 2010 | 1994 Chevrolet Camaro

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Temp. Gauge reads hot

Please do not drive your car until you can check a few things.

To answer your question...your car is hot while sitting at a light, but not when driving because of air movement. Think of it like like this...if you are standing in front of a fan, you feel cooler. If you step away from the fan, it will be warmer.

Back to your car most likely are low on antifreeze. Please check the radiator for how much antifreeze you have. You will want to fill the radiator to the cap. If it has been this way for a while, you will have air in the line. After running the car for a while (after the fans turn on) add more antifreeze. It will most likely will show a lower amount.

Hope this helps.

Dec 21, 2009 | 1995 Honda Accord

2 Answers

I have a 1994 mustang that runs hot when setting idol but when driving it is fine. The fan is working. Do you know what it could be?

Dirty radiator,inside. First try flushing cooling system. If that does not work, Have radiator removed and rodded.

Jun 19, 2009 | 1994 Ford Mustang

1 Answer

Runs hot when on the road but not at idle

valance ,i assume its the fan shroud cover that goes around the fan,if its that?it may help the situation,was it working ok before without it?if yes,it can be cause by defective fan clutch,poor coolant circulation,like a semi blocked rad.low coolant level,sticking thermostat,defective water pump,or even a worn out drive belt or drive belt tensionner but that would affect charging system too! hope it helps!

Mar 10, 2009 | 1993 Chevrolet K1500

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