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Over heating problem when sitting idle or in heavy traffic 2000 mustang

When it starts to heat up the needle moves fast. Also if your able to start moving faster the needle will go back to normal fast.

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  • Ford Master
  • 2,101 Answers

Sounds to be a stuck thermostat

Posted on Nov 02, 2012

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

justuscc
  • 360 Answers

SOURCE: Idles fast

intake leak or a bad idle air controler

Posted on Oct 03, 2008

motor1258
  • 6674 Answers

SOURCE: 2002 caravan, heater problems

That was a common complaint a few years back, due to the fact that the heater core is a little too much higher than the engine, which requires that extra push it gets when engine RPM's increase. One thing I did do on my Caravan was remove my hoses to the heater core, and use a small external pump with hoses to circulate C.L.R. through my core for a while, then let it sit with CLR in the core overnight.Next day I circulated it through again, both ways by reversing hoses, and then re-attached hoses, bled air out of system, and notice quite an improvement in heat at idle. Once cleaned out, the heater core allowed coolant flow through it better at idle. If your stumped by explanation, take it to an automotive shop, or a Rad shop, and get a quote on flushing that core out for you. I recommend the CLR, but it might be too time consuming for you , but a flush will probably show some noticeable improvement.

Posted on Nov 23, 2008

dgjtex
  • 405 Answers

SOURCE: After car heats up (slow to heat) it stil blows cold until moving

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Posted on Dec 22, 2008

66 chrgr
  • 1011 Answers

SOURCE: 1999 Dodge Caravan overheating only while idling

this would be your cooling fan module located by your air filter mounted on the core support.

Posted on Apr 21, 2009

Gort007
  • 1187 Answers

SOURCE: My 1999 Saturn does the exact same thing

The radiator fan is not spinning. Car overheats when idling with no air flowing through the radiator fins.

When you are driving, there is enough air flowing through the radiator fins to keep the Saturn cool.

1. Check the radiator fan (cooling fan) fuse.
2. Check the radiator fan electrical connector. It may have vibrated loose.
3. *sigh* .. replace fan motor....

If you need instructions on how to replace fan motor , please comment.
Just don't let the fan scrape against the radiator when you are removing / rfeplacing the motor.

Hope this helps ... and it's just a fuse.




Posted on Sep 15, 2009

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1996 jeep cherokee temp gauge reads hot 10 mins. after start-up


If you have a viscous fan hub then have it replaced as it is not drawing air through the radiator at idle or slow speed (crawling traffic). Check that are no air locks in the system as they will cause heating problems.

Jan 09, 2014 | Cars & Trucks

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I have a 2001 Ford Mustang V6. For a while now my car has made a rattling sound whenever I turn it on, when I am idling, and sometimes when I accelerate. I haven't noticed any real consequences yet,...


Rattles could be anywhere in a car. Most of the time it is a bolt that has loosened and allowing something to move back and forth. Suggest you try to localize the rattle to which area of the engine from sound and then push and pull on items and see which one moves in that area.

Most of the things that would rattle, are not things that would cause over-heating, so I wouldn't worry on that account.

Aug 29, 2011 | 2001 Ford Mustang

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A/c blows hot air when the car is not moving but it will blow cold air when the car is moving.


Check to see if your electric cooling fan is working when the vehicle is in park with the engine and a/c running. If the fan isn't running then the a/c won't be able to blow cool air as it can't get rid of the heat through the condensor which is located ahead of the radiator. When you are driving over about 35 mph there is enough air being forced through the condensor and radiator to get rid of the heat and the a/c will start cooling properly again. If the fan isn't running and you sit with the car idling long enough [such as in heavy traffic] then the engine may overheat as it also has no way of cooling if the fan isn't working. Usually this fan is powerd by a 30 amp Maxi fuse but each model is a bit different. Your owners manual should have an illistration of the fuses and what they power. Good luck, hope this helps a bit!

Aug 11, 2010 | 2008 Chrysler Pt Cruiser

1 Answer

My Audi A8 2.8 V6 has started to over heat when


Before you replace check to test the car when idling. let the engine build up heat and test the engine temp. if the fan is not activating and shutting off accorrdingly then only you need to check for the thermostat. Since your car is overheating it means that your fan is not working at all or cutting off fast. Insuch a case you can go ahead. But if the fan is working fine and the AC is also switched on, then if the heat goes up, you will need to check for the radiator having any blocks. Check to see physically for any vent blocks on the fins reducing the air flow. even is any paper is stuck this can make the temp go up even if the fan is working. use a good pray washer to clean the radiator. if not flush your radiator and check for rust in system. if all this is not giving any result check for the engine management, for fault in the tining system. The fault should be here. but make sure before you drag to the traffic to test for a long duration idling with the AC put on.hope this is helpful. good day

Jul 12, 2010 | 2000 Audi A8

2 Answers

Car runs great until you have to sit in heavy traffice and will then shut off. If you pop the hood and let it sit for 5 minutes it will restart. There is a tremendous amount of heat that comes out from...


I f the engine is running too hot replace the thermostat, more than likely the ignition module is malfunctioning upon the heat threshold replace it.

Nov 05, 2009 | 2000 Mazda Protege

1 Answer

Over heating and heater takes a long time to heat up


change the thermatstat it has aweak spring in it .could fail all together and over heat

Mar 03, 2009 | 2001 Dodge Durango

2 Answers

Weird humming noise & over heating while sitting in traffic


The humming is the noise the coolant makes when the car overheats and forces open the relief valve in the radiator cap and flows through the small hose to the recovery bottle., it you had all this work this done only 2 things can cause the issue, one is a problem with the cooling fan, the other is a blown head gasket, which I suspect is the problem, before you flushed the system was the coolant rusted?

Nov 18, 2008 | 1996 Ford Escort 4 Door

1 Answer

Nissan 2000 ac hot when idle


the a/c condenser has a fan in front ( there is actually 2 fans if you sit on the car it will be fan on right side ) if this fan does not
come on immediately when you are parked and engine in idle
there is a problem with power to it, or motor failure. If you drive it
on the highway and a/c operates fine that's because air is circulating though condenser (thats what the fan is supposed to do at idle or slow traffic)

Aug 17, 2008 | 2000 Nissan Maxima

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