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Why does the engine cooling fan run on high speed after engine has been idling?
Wiki User
∙ 13y ago
because when car is sitting still and at idle you do not have "air flow" coming into radiator to help cool it as you do when you are driving. So fan compensates for this higher engine - antifreeze temperature to try and cool it off it has to work harder.
Wiki User
∙ 13y ago
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Engine light blinking running rough shaking when idling?
If your check engine light is blinking that means an ignition misfire has been detected
I have been having problems with my Mazda mx6 idling erratically and stallingon a cold start I cant figure out where the problem is coming from Not to mention I've changed and replaced everything?
sounds like iac or air in the cooling system
Why does an '89 Honda Civic's engine sometimes start racing on its own while driving?
Its cold, idling, and old.3b7From my understanding with my own 89 Honda civic LX sedan, is that there is a thermometer that sets idle speed at low and high temperatures, with age, ours have degraded, and the low temp. has been borked. It doesn't hurt your car any, I've checked with a few sources, it just means while your engine is warming up in winter, your car will do that little rev thing every few seconds while idling.
What is over speed?
When the Engine Design RPM is exceed the limit in terms of external force is called over speed. hence For conforming the over speed setting normally engine has been simulated the over speed testing
Why does a 91 Saturn heat up rapidly during a long stop and cool when accelerating?
There are a couple possibilities; if the cooling fan is not turning on, the engine will heat up when idling. The cooling fan runs on a thermostat switch that senses coolant temperature. The switch can fail, as can the motor or the relay. You may need to go through a little diagnostic procedure to figure out what's causing your problem. To see if the fan works, try turning on the air conditioner. When the AC is on, the fan is SUPPOSED to run to pull air across the condenser. if the cooling fan IS turning on, but the engine heats up anyway, it may be a problem with the water pump. After a water pump has been in operation for a while, the vanes will wear and/or corrode making the water pump less effective. At some point it stops functioning at low speed.
What is over speed testing?
When the Engine Design RPM is exceed the limit in terms of external force is called over speed. hence For conforming the over speed setting normally engine has been simulated the over speed testing
Why would a Subaru Outback overheat?
You are not giving enough information to get a reasonable answer. It's like asking why it won't start. Any, and I mean any, detail would help. Are we talking about the engine cooling system? What are the symptoms that bring you to the conclusion it is overheating? Have you checked the coolant level? What year and size engine? Does it overheat only when stressing the engine, like climbing hills? Does it overheat only in traffic and okay on the highway? Does it overheat when the car is idling? Has the head gasket ever been replaced?
What is wrong with 1996 Corvette that runs rich and misses when idling but O2 sensors have been replaced and check engine light is off and there are no more codes to check?
CHECK THE TIMING
How do you tell if the hours on motor match mileagehave a 2005 sierra pu?
The engine hourmeter on the Silverado/Sierra pickups will give the total run time of the engine including idling time. There is no direct correlation to the milage showing on the odometer. The comparisons you can make is if the hours are extremely high and the milage is low then you can assume that the engine has been idling alot. Alternately, if the hours are low and the milage is high then you can assume that the vehicle has a lot of highway miles on it.
The radiator fan does not come on when the engine temp goes above 210 degrees The cooling temp sensor cooling temp switch and one fan relay has been replaced. The fans do activate when the ac is on.?
== == Cooling fans are designed to start at 235 degrees
Does the 1995 Jeep Grand Cherokee 5.2 V-8 have an electric or manual cooling fan?
The original equipment for this engine was a clutch-type mechanical cooling fan and not an electrical one. In 1998 the 5.9 L engine with the Max cooling package had an electric fan and of course your Jeep may have been retrofitted at some point with an electric fan but the specific year and engine you mention came with the manual fan.
What causes the engine to quit when idling?
Could be the O2 sensor, which is attached to the exhaust. Has your engine management light been on? If yes chances are it is this sensor. Careful when buying a new one as there are many different variations. Check the number and colour of wires attached to sensor.
