Every time you turn the key to start the car, you will hear a few repetitive chirping sounds for one to two seconds.
The cause signifies that the starter, fuel pump, and other accessories are “booting up” before operating at full capacity.
But one day, you start the vehicle but realize the fuel pump works but car wont start. That indicates that the vehicle has a serious problem with the internal parts.
Below, we have analyzed the most common causes for stuck drivers in this case.
My Fuel Pump Works But Car Wont Start- 5 Main Causes
There are many reasons why the vehicle cannot start even though the oil pump is working properly.
Its main cause comes from malfunctioning parts of the fuel delivery system and the ignition system.
Scroll down to discover the top 5 causes of your troubles!
Insufficient Compression
The driving force to power a vehicle includes spark, compression, clean fuel, and air.
If the engine’s compression is unsatisfactory, the car will have difficulty starting (it won’t even begin, no matter what you do).
The main causes of a lack of compression include leaking gaskets and seals inside the engine.
Usually, by replacing the new piston rings, valve seals, and other parts of this system, the engine will have intense fuel pressure again.
Bad Fuel Injectors
Dirty fuel injectors (debris, dirt) or rust and corrosion over time can lead to clogged fuel injectors.
When this bad thing happens, the cylinder cannot receive the required amount of fuel, resulting in the vehicle being unable to start.
You can partially prevent this by using high-quality gasoline. Products from unscrupulous sources are likely to contain debris and impurities harmful to your vehicle.
Fuel Pump Problems
If the fuel rail is clogged while your gas supply is okay, then the bad fuel pump is likely the culprit.
This accessory, when damaged, will prevent gasoline from reaching the gas tank to the engine, resulting in an inability to start.
Bad Spark Plugs
The spark plug ignites the fuel and air inside the engine, causing an “explosion” to provide energy, maintaining the vehicle’s power.
These products can typically serve 100,000 miles before needing a new replacement. However, their lifespan can even decrease for some reasons, such as:
- Car engines accumulate too much carbon
- Leaking oil into the engine and spark plugs
- A malfunctioning part of the ignition system (ignition coil, computer) prevents the spark plug from receiving proper energy.
Faulty Crankshaft Position Sensor
A spark has to happen at the right time for a car engine to begin combustion.
If the ignition timing is too late or too early, the mixture of fuel and air that is not fully ignited can reduce the engine’s performance and ability to start.
One of the leading causes of this condition is a faulty cam position sensor.
Since the crankshaft provides the position of the pistons and valves to the Engine control unit (ECU), the ECU will not be able to determine the correct spark ignition timing without the crankshaft.
Why Won’t My Car Start After Getting Gas Fuel Pump?
Your car can’t restart right after getting the gas fuel supply? We’ve helped you list the 7 most common causes for this phenomenon. Let’s check!
EVAP Purge Control Valve Problems
A stuck EVAP purge control valve is the top reason your vehicle won’t start after being filled with gas at the tattoo station. After serving with fuel, the air pressure in the gas tank will increase.
In addition to sealing the feed nozzle, the pressure will push air directly into the intake manifold. The internal combustion engine receives too much fuel, making it difficult to start the car.
Dead Battery
The dead car battery or its loose battery terminals cannot supply any power to the starter motor, resulting in a sudden shutdown after refueling.
Normally, drivers should pay attention to replacing every time the battery reaches 3 to 5 years of life.
You can recognize a bad battery if the car’s lights are dimmer and the electronics inside the vehicle become “weaker.”
In addition, regularly check the loose connections and the corrosion on the battery surface and use baking soda to get the product working properly again.
Clogged Fuel Filter
The fuel filter prevents dirt and contaminants from reaching the engine. Over time, these contaminated objects will build up inside the filter wall, leading to serious blockages.
In addition to significantly reduced vehicle performance and poor fuel economy, the car frequently fails to start.
Typically, a bad fuel filter needs a replacement every 20,000 to 30,000 miles. Besides, regular maintenance is the key to detect potential problems promptly.
Defective Fuel Pump
The fuel supply ensures the fuel tank can operate at cooler temperatures. But when the fuel level drops below the allowable level, it can cause thermal overload and damage the pump.
In case of some awkward engine noises when operating at high speed, the hiss from the fuel tank combined with the phenomenon of frequent stalling, this is the signal for help from the fuel pump motor!
Check the pressure with the fuel gauge immediately to prepare a new fuel pump replacement.
Bad Starter Motor
When inserting the key into the lock and turning, you may hear a suspicious click, a sign that the starter is having problems.
However, this dead spot problem can be quickly solved using a little force. For modern vehicles with a manual transmission, “bump-starting” is probably the most common solution.
Faulty Alternator
The generator helps the vehicle charge the battery while the engine is running. Without its support, the car battery will die quickly, which causes the engine to stall suddenly.
You need to turn off the engine and use a multimeter to check the condition of the vehicle’s alternator.
You will need a replacement product immediately if the measurement is not between 12.5 – 12.8 volts.
Bad Spark
Spark plugs play a major role in igniting the air and fuel mixture inside the engine. If its plug is dirty/damaged, the engine may misfire, resulting in starting problems.
Any malfunctioning part of the ignition system (such as the ignition module, the switch, the circuit, and the spark plug wire) can lead to a starting failure.
Therefore, take your vehicle to a repair center for some professional mechanics to diagnose and replace the faulty part.
Faqs
What Are The Symptoms Of A Bad Fuel Pump Module?
Drivers can identify a faulty fuel pump module through the following common symptoms:
- The electric fuel pump cannot transport fresh fuel from the tank to the injector.
- The fuel filter is clogged by contaminated objects, restricting the energy flow transported into the engine.
- The car won’t start or stall no matter what support measures you use
- The bad fuel tank makes loud noises
- Raw idling engine
- The fuel economy is getting worse
- Visibly reduced engine efficiency
- Battery power increase and decrease suddenly
What Fuse Would Stop A Car From Starting?
Fuel pump fuses can quickly disable the vehicle’s ability to start. In addition, some important fuses (such as electrical control units and coil packs) can also do this if they are not located in their respective locations.
How Do You Test A Fuel Pump Relay With A Multimeter?
It would help if you clipped the lead from the negative terminal on the battery to the number-85 pin while connecting the battery positive terminal to the pin with an 86.
If there is a clicking sound when you plug in power, it means the starter relay is working very well.
Some Last Words
If your fuel pump works but car wont start one day, you will have a headache finding the cause and reasonable replacement for the damaged part.
But through this article, surely the issues related to this topic are no longer your big questions.
So now, it’s time to roll up your sleeves and work on uncovering the source of the problem. After locating the cause, contact the repair center for the most reasonable repair and maintenance plan.