Question about 2005 Saturn Ls

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Traveling on the hwy.the car starts to sputter and slow down in its own,the cooling fan kicks in ..

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Fuel filter and needs tune-up

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I have a 99 grand cherokee limited 4.7 that overheats when on the hwy


Sounds perfect to me. The fan sound is normal for a clutch fan. The temps are just not too high at all. Remember, the system has two main points that make the temp okay: Coolant (in the right amount) and PRESSURE. Both seriously raise the boiling point.

At even higher temperatures, Eventually, you should hear the fan kick in, as loud as when cold..This REALLY moves air through the rad and should curtail any overheat.

Doc

Apr 27, 2012 | 1999 Jeep Grand Cherokee

1 Answer

I`m having boilover when I slow down or stop.


Sounds like the cooling fan or the circuit is faulty. When you are traveling at highway speeds, it runs fine? But around town it gets hot? If that is correct, it is probably the cooling fan or circuit. Could be a switch or fan motor faulty.

Nov 08, 2010 | 1994 Mercury Sable

1 Answer

Fan doesn't run while in idle and begins to over heat until I start driving agin then it cools back down to normal. Also the fan runs when engine is off and drains the battery.


The fan is only supposed to come on when there is excess heat .. in normal driving conditions it doesn't start. When you start your car in the morning the fan won't come on because the engine is cold.

With a hot engine - and it depends how hot the engine is - the fan will only kick in to prevent overheating. In heavy slow moving traffic or a traffic jam, the fan will kick in if needed.

The air flow through the radiator is usually sufficient -in normal driving conditions - to cool the engine.

When you park up and the car has a hot engine, the fan will kick in. This is perfectly normal. It is caused by a surge of hot coolant triggering the fan sensor. Perfectly normal.

The fan then should cut out after a while .. maybe 2-3 minutes at the most. If the fan runs continuously that suggests a fault in the temperature sensor switch.

Next time - wait by the car and see how long it takes for the fan to quit after you have parked up. It should stop of its own accord after a couple of minutes.

If the fan cuts off after a short while, and your battery is becoming drained, that's probably a battery or alternator fault.

Remember: when you start the car the fan won't kick in at idle speed because the engine is COLD, and there is no reason for the fan to start up ..
The fan WILL kick in for a couple of minutes after you have parked the vehicle and the engine is hot

Aug 14, 2010 | 1999 Jeep Grand Cherokee

1 Answer

When idling my jeep overheats. The cooling fan is running and it speeds up when temperature goes up. The temperature gets close to 260 degrees and the engine tries to stall. when I start moving it cools...


At idling speed an engine does build up a lot of heat and the cooling fan will kick in. In slow moving traffic or traffic jams the temperature gauge can touch the red - particularly on hot days. The reason it cools down when you start moving is because of the air flow through the radiator.

Presumably there are no leaks from the cooling system otherwise you would have mentioned it. In normal circumstances the fan will not be running as you are driving at speed, as the air-flow through the radiator is sufficient to cool things. The fan only kicks in to get rid of excess heat - and this usually occurs at idling speed or after you have parked the car.

If the fan is running all the time as you drive, this points to either a fault in the fan switch, or the car is running too hot. presumably in normal driving the fan isn't running and the temperature gauge reads normal?

It is common - in stationary traffic many cars overheat (particularly big engined models) try to stall and 'cut out'. Restarting can be difficult until the engine cools down.

Is your car overheating in normal driving conditions or just at idle speed? Overheating in normal driving conditions can be caused by things like a failing water pump, blocked radiator, collapsed hose, faulty thermostat or, in the worst case scenario, cylinder head problems.

Overheating at idling speed is 'common'. Check your coolant level. If your car isn't using/losing coolant then there probably is no major problem. You can flush out the cooling system and refill with new coolant - and also check your radiator. Are the cooling fins crumbling with age? Or maybe they're partly clogged with insects and debris from the road? A blast with a hosepipe wil sort that out ..

The question is how much does your car overheat in normal driving? If it doesn't .. it appears as though you have nothing to worry about as such. Most cars have 2 speed fans... the 2nd faster stage kicks in at some point dependant on engine temperature. Perfectly normal.

Aug 14, 2010 | 2003 Jeep Grand Cherokee

2 Answers

98 Camero overheats when driving slow or stop, ok


You need to get the cooling fan checked,it may need a temperature sensor,fan relay or the fan motor may be burnt out.You can check the fan by running your own power and ground to the plug that comes out of the fan motor,unplug it and put the ground to the black wire and positive power to the other one,if it works then the next step would be to check the fan relay.The most common problem if the fan doesn't work but can be made to work with jumper wires is the temperature sensor,you can check it by unplugging it and jumping the wires in the plug.If the rad fans work then you are down to either the water pump or a plugged radiator,a rad shop should be able to narrow it down for you.

Jul 14, 2010 | 1998 Chevrolet Camaro

2 Answers

Sputters then dies


Most likely a lack of fuel, check the fuel filter first.

Aug 13, 2009 | 1988 Saab 900

1 Answer

Radiator fans DO NOT come on when Idling..What is wrong?


The fans are engine temperature controlled. Is yours running hot or hotter than the temperature programmed for them to turn on?

Jun 24, 2009 | 2004 Dodge Stratus

1 Answer

Transmission automatically shifts to low at idle


after my 2003 chrysler concorde is warm I slow down from the hwy and right before I stop my car shifts to LOW gear and stays there until I turn my car off and start it.

May 05, 2009 | 2003 Chrysler Concorde

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