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Why would heater blow warm air while driving but cold air while idling and why would enigine temperature go up while idling and down when driving?
When a vehicle is idling, the engine may not produce enough heat to warm the coolant effectively, leading to cold air from the heater. In contrast, while driving, the engine works harder and generates more heat, allowing the heater to blow warm air. The engine temperature can rise while idling due to reduced airflow through the radiator and less coolant circulation, while driving increases airflow and coolant flow, helping to cool the engine.
What else can I help you with?
Why does your heater blow cold air while idling but blows hot air while driving?
Low coolant, failed thermostat, partially plugged heater core...............
Why does the heat blow cold while idling and warm when driving?
Poor circulation probably due to a restricted (plugged up) heater core.
Why would your Uplander throw heat while driving and cold air when idling?
Poor circulation through the heater core. Probably a semi-plugged heater core or a faulty thermostat (assuming the coolant level is full).
How much fuel does a SUV waste idling?
Effectively all the fuel that it burns while idling. You are getting 0 miles per gallon while idling.
What would cause an unpredictiable temperature needle while driving and idling and could it be the water pump or a blown gasket?
I'd be suspicious of the thermostat.
Heater doesn't work when idling and coolant leaking?
water pump
Why would a 96 Taurus wagon heater only blow when running at high RPMs and cool down when idling?
it has a partially clogged heater core.replace the heater core
When my car goes on the highway the heater doesn't work very goodwhy is this?
If it blows warm while idling and cool as you accelerate down the road, the coolant is low and or doesn't have proper mixture for your avg. temperature.
Is there any method used to utilize driving shaft's rotation during idling of the vehicle?
As the vehicle sits idling the driveshaft is not rotating.
Can spark plugs cause car to shake?
Yes, when idling and driving.
What causes a hum when driving but not when idling?
Probably wheel bearings or wheels are unbalanced
Does your car use more gas idling or driving down the street?
It depends on how long you are idling, or how fast you are going. If you know you are going to be idling for a long time, it's best just to put your car in park.
