VauxhallVauxhall Astra Keeps Cutting Out: Common Causes And Fixes

Vauxhall Astra Keeps Cutting Out: Common Causes And Fixes


If your Vauxhall Astra keeps cutting out you’re in the right place.

In this article, we’ll dive into the common causes and fixes for this frustrating issue.

From fuel system problems to faulty sensors and more, we’ll explore all the potential culprits behind your Astra’s sudden stalls.

By understanding these issues and taking prompt action, you can ensure a smoother and more reliable driving experience.

Astra Coil Pack Problems

If your Vauxhall Astra keeps cutting out, one possible cause could be the Astra coil pack connection. This is also a problem with the Vauxhall Corsa.

The coil pack is responsible for delivering electrical current to the spark plugs, which ignite the fuel in the engine. When the coil pack is faulty or worn out, it can lead to misfires, rough idling, loss of power, and ultimately, the engine cutting out.

A faulty / loose connection leading to the coil pack is a known issue for several Astra models. If you’re having trouble stating your Astra once it has cut out, try wriggling the connection leading to the coil pack. If the engine starts, you have diagnosed your issue.

To fix this issue, you will need to replace the faulty coil pack with a new one.

It is important to address Astra coil pack problems promptly to ensure reliable performance and prevent further damage to the engine.

Coil pack

Astra LSPI

LSPI (Low speed pre ignition) is a phenomenon that is believed to occur when small oil / fuel droplets ignite in the engine cylinders before the actual ignition event.

This results in uncontrolled combustion and can cause serious damage to the engine, including cracks in the cylinders, bent valves etc.

LSPI was a relatively common issue in some Astra models, however, several recalls and software updates to the ECU have reduced the number of reported LSPI issues.

To prevent LSPI, make sure to address potential causes and implement appropriate solutions. Here are some helpful tips to keep your Vauxhall Astra from cutting out:

  • Regularly check and clean the throttle body to ensure smooth airflow and prevent carbon buildup.
  • Use high-quality fuel and additives to minimize the risk of fuel system issues.
  • Maintain proper oil levels and perform regular oil changes to prevent engine problems.
  • Keep your ignition system in good condition by regularly inspecting and replacing spark plugs, ignition coils, and plug leads if necessary.

By following these steps, you can reduce the chances of your Vauxhall Astra experiencing LSPI and enjoy a more reliable driving experience.

Relays and Associated Fuses

Faulty relays are a common cause if you have experienced your Astra suddenly cutting off when slowing down at junctions or roundabouts.

Relays and fuses play a crucial role in controlling various electrical components in your Vauxhall Astra, such as the ignition system, fuel pump, and power windows.

Th main relays to suspect when troubleshooting for your cause are the ignition main relay, engine controls relay and the fuel pump relay.

Over time, these components can become worn or damaged, leading to issues like engine stalling or electrical failures.

To prevent such problems, it is important to inspect the relays and fuses periodically. Start by visually inspecting them for any signs of damage, such as burnt or corroded terminals. If you notice any issues, replace the faulty relays or fuses with new ones of the correct rating.

Position Sensors

The position sensors in the Vauxhall Astra’s engine play a crucial role in ensuring proper performance and preventing stalling. These sensors, specifically the crankshaft position sensor, provide important information to the engine control unit (ECU) about the position and speed of the crankshaft.

This data allows the ECU to accurately calculate ignition timing and fuel injection, ensuring optimal engine operation. If the crankshaft position sensor is faulty or malfunctioning, it can cause the engine to cut out unexpectedly.

In such cases, it is recommended to have the sensor checked and, if necessary, replaced by a qualified technician.

Regular maintenance and prompt addressing of any sensor-related issues are essential to maintaining the reliable performance of the Vauxhall Astra.

Fuel Filter

One possible cause of your Astra cutting out could be a clogged fuel filter. The fuel filter is responsible for removing impurities from the fuel before it reaches the engine.

Over time, the filter can become clogged with dirt, debris, and sediment, which can restrict the flow of fuel and cause engine performance issues.

To fix this issue, you’ll need to replace the fuel filter. First, locate the filter, which is usually located along the fuel line, before removing the old filter and installing a new one.

Regularly replacing the fuel filter as part of your vehicle’s maintenance routine can help prevent engine cutting out and ensure optimal performance.

Fuel filter

Other Issues

If you still haven’t gotten to the bottom of your Astra cutting out, here are some other issues that may contribute to the problem:

  • Faulty ignition coil: A faulty ignition coil can cause intermittent loss of spark, resulting in the engine cutting out. It may need to be replaced to resolve the issue.
  • Clogged air filter: A clogged air filter can restrict airflow to the engine, leading to a decrease in performance and potentially causing the engine to cut out.
  • Fuel pump problems: A malfunctioning fuel pump can cause inadequate fuel delivery, resulting in the engine cutting out. Checking and replacing the fuel pump if necessary may be required.
  • EGR system: A build up of carbon particles in the EGR system can block tubes and get into the valve’s mechanism, either locking the valve open or closed. In extreme cases this can cause the engine to cut out.
  • Electrical issues: Problems with the electrical system, such as a faulty wiring harness or a loose connection, can cause intermittent power loss and engine cut out.

Addressing these issues promptly and seeking professional assistance if needed can help resolve the problem of the engine cutting out in a Vauxhall Astra.


Why is my Vauxhall Astra cutting out at junctions?

When your Vauxhall Astra is cutting out at junctions, it could be a fault coil pack connection, a dirty throttle body, or even a failing idle control valve.

Why is my Vauxhall Astra cutting out whilst driving?

When your Vauxhall Astra is cutting out while driving, a common cause is a fault coil pack connection. A failing idle control valve or a dirty throttle body are also potential causes.

Why is my Vauxhall Astra cutting out when warm?

Your Vauxhall Astra cutting out when warm could be down to a broken track in the ECU. If your code reader is giving a fuel pump relay fault and you have ruled out any issues with the fuel pump relay, a broken track on the ECU is the next likely cause.

Where is the Astra crankshaft sensor located?

The Astra crankshaft sensor is located behind the starter motor for most Astra models. Inspection of the sensor often requires the starter motor to be removed.


In conclusion, understanding the common causes and fixes for a Vauxhall Astra cutting out is crucial for maintaining reliable performance.

Issues such as coil pack problems, LSPI, faulty position sensors, and fuel filter issues can all contribute to this problem.

Regular maintenance and prompt addressing of issues are essential to prevent further damage and ensure the longevity of your vehicle.

By staying proactive and addressing these issues promptly, you can enjoy a smooth and uninterrupted driving experience with your Vauxhall Astra.

Dave Marlow
Dave Marlow
Dave has been a petrohead since he can remember. He worked as a mechanic for 12 years before transitioning into automotive content writing. His dream car is a classic Red Ferrari 458.

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