How to Find a Leaking Fuel Injector

Leaking fuel injectors can decrease gas mileage and pose a safety threat.

homeandauto
homeandauto | 29 Sep 2012
Revised 29 Sep 2012
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Leaking Fuel Injectors - Do You Smell Gas?

One of the first things someone will notice when they have a leaking fuel injector is the smell of gas in or around their car.  They may check your gas cap so make sure it is tightened securely, or suspect a leak around the fuel filter or fuel lines.  Sometimes the fuel system may have a leak in the charcoal canister and other ventilation components as well.

The injectors will usually leak gasoline onto the engine due to a faulty seal, which would usually be a damaged o-ring.  Injectors do not normally leak, but a leak can start after doing maintenance on the injectors of if the seals are damaged.  These leaks will also cause a decrease in gas mileage.  If you have recently removed your injectors and are now smelling gasoline frequently, you may have a damaged fuel injector o-ring.

How to Find a Leaky Fuel Injector

When looking for a leaking fuel injector you may notice stains on the manifold and around the leaking injector, if the car has recently running, wet fuel may still be present at the injector base and on the block.  Having fuel on the hot manifold surface is a safety hazard, the fuel can easily catch on fire - especially at elevated temperatures.

Automotive Repair Resources

This article describes the steps to identify and repair a leaking fuel injector.  You can find necessary parts on-line such as fuel injectorsfuel injector o-rings and repair manuals for your vehicle.  Be sure to get the appropriate parts for your specific make and model to properly repair a leaking fuel injector.

 

 

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