Air in Fuel Line Car Won T Start

Last Updated on June 24, 2023 by Ryan

If the air in the fuel line is preventing your car from starting, you will need to bleed the lines. This can be done by removing a fuel injector or fitting and then loosening any bleeder screws on the fuel rail. Then start your car engine until all of the air has been purged from the system.

If there are no bleeder screws, then open up one of the injectors and use a hand-held vacuum pump to pull out as much air as possible. Once this is complete, reassemble everything and try again to see if that solves your issue with your car won’t start due to an air lock in its fuel line.

If your car won’t start, it could be due to air in the fuel line. Air can enter the fuel line and prevent the engine from getting enough gas to function properly. If this is the case, you’ll need to bleed out any trapped air before restarting your car.

Make sure you consult a knowledgeable mechanic or refer to your owner’s manual for instructions on how best to do this safely.

How to purge air in fuel lines on D13 (No start fix)

What Happens If Air Gets in Your Fuel Line?

If air gets into the fuel line, it can cause a number of problems. When air is present, it displaces some of the fuel in the line and causes a decrease in fuel pressure. This decreases engine performance as well as increasing emissions due to incomplete combustion.

Additionally, if there is too much air in the line, it can lead to vapor lock where vaporized gasoline accumulates and clogs up the system preventing any more from flowing through. In severe cases this could cause your car to stall or shut off completely until all of the excess air has been removed from your system.

How Do I Get Air Out of My Fuel Line?

If you have air in your fuel line, it can cause a variety of issues from hard starting to poor performance. To get the air out of the fuel line, you will need to start by locating the fuel filter and unscrewing it from its mounting point. Next, gently lift up on the filter while applying pressure with your finger over the inlet port at the same time.

This should create a vacuum which will draw any trapped air out of the line. Make sure to keep an eye on both ends of the filter as this process takes place and if necessary use some compressed air or even an automotive vacuum pump to further remove any remaining bubbles. Once complete, firmly reattach all components before attempting to start your vehicle again!

How Do I Know If I Have Air in My Gas Line?

If you suspect that there may be air in your gas line, one of the most telling signs is a decrease in overall performance from your vehicle. This could manifest in decreased fuel economy, an increase in stalling or sputtering while driving and/or rough idling when the engine is running. Additionally, if you observe any strange noises coming from the motor compartment (such as hissing), this can often indicate an air leak within your gas line.

It’s important to take action as soon as possible if such symptoms arise, so it’s best to schedule an appointment with a certified mechanic for further diagnosis and repair work if needed.

Air in Fuel Line Car Won T Start


Air in Fuel Line Symptoms

Air in the fuel line can cause serious problems for a vehicle. Symptoms of air in the fuel lines include difficulty starting, engine misfires, decreased power and acceleration, rough idling, and an illuminated check engine light. It is important to have any symptoms of air in the fuel line checked out by a professional immediately to prevent further damage to your car’s engine.

How to Remove Air from Fuel Line

One way to remove air from a fuel line is to use a vacuum pump. This procedure will draw out any air bubbles that have become trapped in the line, allowing for a more efficient flow of fuel. It’s important to ensure that all connections are secure before you start and be sure to take your time when doing this so as not to damage the line or cause further issues with performance.

How to Bleed Air from Fuel Line

One of the most important steps when replacing fuel lines is to bleed any air from the new line. This can be done by removing the old filter and opening up the valve on the fuel tank, then slowly squeezing and releasing a small section of hose until all air has been released from it. Once that’s done, you should close off both ends with clamps and reconnect them back together before refilling your tank with fresh fuel.

Following these simple steps will ensure that your vehicle will run smoothly without any unnecessary problems or issues related to air in its fuel line.


In conclusion, a car won’t start if there is air in the fuel line. It is important to check the fuel lines regularly for any blockages or contamination. If there seems to be an issue with air getting into the fuel line, it should be checked as soon as possible by a qualified mechanic.

Taking these steps can help prevent further damage and costly repairs down the road.


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