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Showing posts with label Car Starting Diagnostic. Show all posts
Showing posts with label Car Starting Diagnostic. Show all posts
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Car Cranks but Wont Start

Car Cranks but Wont Start

The car cranks but won’t start. The possible reason why car cranks but won’t start are  out of gas, broken timing belt, clogged air filter, battery is weak or frozen battery electrolytes.

Out of Gas

When the car cranks faster than normal then it is possible that the car is out of gas, therefore during cranking observe if the car will crank faster than normal then check if the car has fuel. Just fill the car with enough fuel and crank again.

Broken Timing Belt

If the car has enough fuel then the possible problem is that the car timing belt is broken. The broken timing belt can cause the engine compression to become low and since the car has low compression it is the reason why the engine cranks but won’t start. Timing belt ensures the engine valve to close during the combustion of each engine cylinder when the belt is broken there will be no compression in each cylinder thus the car won’t start during cranking.

Car Cranks but Wont Start

Bring the car to a reputable car shop and ask the mechanic to check the timing belt to confirm if it is indeed broken, if the mechanic confirms the broken timing belt then have it replaced.

Clogged Air Filter
If the car cranks normally or is the same as when the car is about to start then the possible problem is a clogged air filter. The clogged air filter is the reason why the car cranks but won’t start because when the air filter is clogged there is not enough air going into the engine, the air filter becomes clogged because of too much dirt in the element, this dirt is preventing the air to go inside the combustion chamber. Since there is not enough air inside the cylinder then it will not start because air is one of the components necessary for combustion.

Now, start the car and observe if the engine cranks the same as when it is about to start. Open the hood and locate the air filter. Removed the air filter then clean it, usually to clean the air filter just spray a pressurized air on the element. Cleaning the air filter is just a temporary solution to the problem.

The permanent solution is to replace the air filter. Normally air filter is replaced every two years, therefore, verify if the air filter installed on your car is past the two years period.

Car Battery is Weak or Battery Terminal is Corroded
If the car cranks slower than normal then the possible problem is a weak battery or the battery terminal is corroded. When the battery is weak there is not enough power to crank the engine, however, if the terminal is corroded then the current that flows into the starter is not enough to start the engine because the corrosion interferes on the flow of current.
Check the car battery.

Car Turns Over but Won't Start

The car turns over but won't start. The car is cranking slowly however, it will not start. If the car is turning over slowly and will not start the possible reason is the battery.

Read more : Car Turns Over but Won't Start

Do the simple test to check if the battery is weak

1. Turn ON the headlights then turn the ignition key to start the engine while the headlights are ON.
2. During cranking observed if the brightness of the headlights changes, if the brightness changes when the engine is crank then there is a problem with the battery.

Now open the hood and locate the battery. Look thoroughly at the battery terminal for any corrosion present on the terminal. If the terminal is corroded then it is the reason why the car won’t start.

Clean the terminal with a wire brush. Apply a baking soda mix with water into the terminal before brushing with a wire brush. Also after the cleaning apply petroleum jelly on the battery terminal to prevent the terminal from corroding in the future.

However, if the terminal is not corroded then the battery is weak. Now, look at the fluid level of the battery, remove the fluid filler cap and check if the battery fluid covers the top of the battery plate, if not then add distilled water on the battery. The distilled water must cover the top of the battery plate then jump start the car to start the engine.

How to Jump Start a Car Battery

Jump starting a car is easy but should be done correctly so that accidents such as a battery explosion can be avoided.

Read more : How to Jump Start a Car Battery

However, if the battery has enough battery fluid then you have no other choice but to replace the battery with a new one.

Frozen Battery Electrolytes
If the car cranks but won’t start only when the temperature is very cold then the problem is a frozen battery electrolyte. At a very cold temperature, the electrolytes inside the battery may freeze or partially freeze, if this happens the battery will lose its power and it will not start the engine.

Let the battery get warm for a while before starting the car. Now if you are about to drives on a very cold region use a battery with a higher cold cranking rating.

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Engine Turns Over but wont start

When the engine is starting the engine turns over but won't start, the possible reason why the car wont start is that the current flow to the starter is restricted, other reason is a weak battery, bad starter, a partially frozen electrolytes or a bad electrical connection.

Possible cause why the Engine turns over slowly while starting

(1) Restricted Flow of Current to the Starter.
This kind of problem is usually involving battery, now determine if the car has a battery related problem by doing a simple test. Turn on the ignition key to start the engine then observed if the headlight brightness changes. If the engine headlights changes brightness while the engine is starting then it is a battery related problem.

When the engine turns over slowly and will not start and while doing the simple test the head light brightness changes while the engine is trying to start then it more likely that the current is not flowing into the starter.

Open the hood of the car and locate the battery. Check the battery terminal if there is a cruddy like substance this means that the terminal is corroded. This causes the current not to flow into the starter.

To fix the problem you need to remove the corrosion on the battery terminal.
Apply some baking soda and water on the terminal to help dissolve the corrosion then brush the terminal using a wire brush. After the terminal is cleaned, apply some petroleum jelly on the terminal to help prevent terminals from corroding in the future.

Weak Battery
After doing a simple test mentioned above and after inspection of the battery terminals, the terminals is free from corrosion then the problem is a weak battery. When a battery is weak the battery cannot provide enough current to start the engine and will only turns over during starting.

How to Jump Start a Car Battery

Jump starting a car is easy but should be done correctly so that accident such as a battery explosion can be avoided.

Read more : How to Jump Start a Car Battery

Check the liquid level of the battery, the liquid must cover the top of the plates inside the battery. Add some distilled water on the battery if the fluid level is low. If the problem still occurs then replace the battery with new one.

Bad Starter

Try to start the engine and observe if there is an unusual sound like grinding or growling sound coming from the engine. If there is grinding or growling sound then a problem is a bad starter. If the starter is bad the engine will not crank fast enough to start the engine.

To fix the problem you need to replace the starter. Consider using a rebuilt starter since it is much cheaper than the new starter.

Partially Frozen Battery Electrolytes
If the problem happens only when the temperature is very cold then the problem is a frozen battery electrolytes. When the electrolytes of the battery is frozen it causes the battery to lose much of its power, battery with not much power will not crank the engine.

In this case just wait for the temperature to get warm and let the battery electrolytes to defrost before starting the engine. Also if you are driving mostly on cold area use a battery with a good cold cranking rating because this kind of battery is reliable in cold weather.

Bad Electrical Connection
When the battery and the starter is in good condition then possible problem is a bad electrical connection. Usually a bad electrical connection between the starter and the battery happens this will result in the starter not getting enough power to turn the engine to make the engine start.

Look at the electrical connection between the battery and the starter, check if there is a loose connection in between or bring the car to a reputable car shop and ask the mechanic to inspect the connection between starter and battery.

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