Why does my Cavalier radiator fan keep coming on?

If the sensor does not have the right resistance to change the voltage returning to the computer the wrong signal will be sent. Inspect the radiator fan by spinning it with the fingers and see if it is free moving. Do this only with the engine off and cool. The fan can come on at any time even with the key off when the engine is warm.

How to add refrigerant to a 1995 Chevy Cavalier?

How to Add Refrigerant to a 1995-2005 Chevrolet Cavalier – 2002 Chevrolet Cavalier 2.2L 4 Cyl. Sedan (4 Door) 1. Getting Started – Prepare for the repair 2. Open the Hood – How to pop the hood and prop it open 3. Locate Port – How to access the low pressure port 4. Air Conditioning Fill – Safely add refrigerant to your A/C system 5.

Why is my Chevy Cavalier blowing hot air?

When the air conditioner in your 2002 Chevrolet Cavalier starts blowing hot air, you likely have a freon leak. Recharging the freon in your AC system is an inexpensive and easy first step to restoring the cooling capacity of your A/C system.

Where is the ECT on a Cavalier radiator?

It is located near the coolant outlet on the upper rear of the hose. When the connector is pulled off of the ECT, within a second or two the fan should come on. If it does come on, the ECT is suspect. Check the voltage with the meter by backprobing the sensor when the engine warms up.

What kind of motor does a Chevy Cavalier have?

IPP (and myself included), has worked for years in the development of sport compact motors, with a strong focus on the 2.2 Chevy Cavalier both with street drivers, street/strip and all out racing. So let’s start by addressing N/A (Nat Aspirated) motors first.

Why do you need a radiator fan in a car?

To stop the engine from overheating, we take the help of coolants that flow through a radiator into the engine. The radiator’s job is to keep the coolant cool so that when it returns back into the engine, it is able to absorb more heat. A radiator fan is thus used to keep the temperature of the coolant in check. Thus, it has an important job.

What should I do if my radiator fan is not working?

Inspect the radiator fan by spinning it with the fingers and see if it is free moving. Do this only with the engine off and cool. The fan can come on at any time even with the key off when the engine is warm. Install a jumper wire to the red wire at the harness connector and the black wire to ground.

How is the radiator fan on a Chevy Cavalier controlled?

A radiator cooling fan on a Chevy Cavalier is controlled by the computer. Its circuit goes from the battery positive to the fuse. From the fuse it travels to two relays: the low-speed and the high-speed relay.

Why is my radiator fan not coming on?

When the connector is pulled off of the ECT, within a second or two the fan should come on. If it does come on, the ECT is suspect. Check the voltage with the meter by backprobing the sensor when the engine warms up.

Can a car fan come on when the engine is off?

The fan can come on at any time even with the key off when the engine is warm. Install a jumper wire to the red wire at the harness connector and the black wire to ground. Touch the red jumper to battery positive side and the fan should operate if it is not burnt out.

Why is the crankshaft noise so loud under heavy load?

This noise is loudest when the engine is under heavy load. Excessive crankshaft end play is indicated by an intermittent rap or knock sharper than a worn main bearing. The following are causes of main bearing noise: A damaged or worn connecting rod bearing will produce knock under all speeds.

Why does my car make a loud noise when I start the engine?

Damaged or worn main bearing noise is revealed by dull thuds or knocks which happen on every engine revolution. This noise is loudest when the engine is under heavy load.

What’s the problem with my 90 Cavalier Z24?

Hey everybody my 90 Cavalier z24 automatic its v6 fuel injected has some problems. First to start i changed spark plugs and did a throttle body cleaner. heres the problem. The car starts and idles a little high a little above 1000 rps.

Damaged or worn main bearing noise is revealed by dull thuds or knocks which happen on every engine revolution. This noise is loudest when the engine is under heavy load.

Why does my 440 Mopar make a rattling noise?

MY 440 mopar runs incredible at idle to 1500 rpm, but around 2000 rpm, the engine becomes overcome with loud rattling, noise, thousands of “rocks gone wild” come from the engine or transmission. It sounds like the motor is falling apart.

How does a radiator fan work in a car?

They are actuated by the computer, which uses the engine coolant temperature (ECT) sensor to determine when to turn the fan on and which relay to actuate dependent on the temperature. The ECT sensor is a 2-wire thermistor. As engine coolant temperature increases, the thermistor resistance and signal voltage decreases.

Why are the cooling fans not working on my car?

1. Engine running hot 2. Cooling fans do not function 3. Cooling fans stay on at all times Average rating from 129,472 customers who received a Vehicle Engine Cooling Inspection. Most modern vehicles use electric cooling fans to help pull air through the radiator so that it can keep the engine cool.

Why is my Cavalier 2.2 leaking coolant?

There is a leak due to corrosion in an elbow in the coolant system in my son’s 2002 Cavalier 2.2. The upper radiator hose connects to the elbow, which goes into the engine (block?).

What are the symptoms of a bad cooling fan relay?

1. Engine running hot One of the first symptoms commonly associated with a bad or failing cooling fan relay is an engine that runs hot or overheats. If you notice that your engine is running at higher temperatures than normal, that may be a sign that the relay is not functioning properly.

Why does my Chevy Cavalier not turn on?

1996 Chevy Cavalier 2.2 lt engine. Today i found, Cooling fan does not turn on even after reaching operating temperature.Engine overheats when idling. It does not turn on, when A/C is turned on ( I realized AC is also not working on my car, it may be related or not).