Your car’s fuel system is comprised of the fuel pump, filter, tank, and injectors. Issues with any of these components may reveal similar symptoms. But, if you experience one or more of the problems listed below, the fuel injectors may well be the main culprit. Here is what to look for:

• Difficult Starting: If you have to crank the car many times before it starts, the injectors could be the issue. You may also have the same problem if the fuel pump or filter is damaged. If you have run out of gas before, then this can also cause fuel injector problems.

• Uneven Idling: Your car may struggle to maintain an even idle at traffic lights or even stall. Some cars idle higher at start up, so this issue may only present itself after the engine has warmed up.
• Rough Running: If your engine feels rough when accelerating, the injectors may not be delivering the right amount of fuel. This is usually more noticeable under hard acceleration. This issue can also be traced back to a damaged or partially blocked fuel filter.
• Poor Performance: Does your vehicle feel like it’s lost some of its mojo? It may not be getting the right amount of fuel under heavy loads. A weak injector won’t be able to deliver enough gas into the combustion chamber. This will result in an overly lean fuel/air mixture.
• Excessive Fuel Consumption: Are you refueling more often than before? Keep an eye on how many miles you do between fill ups. Excessive fuel consumption can often be traced back to leaky fuel injectors.
• Smell Of Fuel: A modern high pressure fuel injection system can develop microscopic leaks. Fuel evaporates quickly so sometimes the only sign that you have a leak is a strong smell of gas from under the hood, specifically the engine bay.

Ignoring any one of these symptoms can eventually lead to engine damage. The oxygen sensor will lacquer up and your catalyst will fail. This will cause excess pollution and a failed emissions test.