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Finding the Reasons why a BMW 740il Fuel Injector Fails

Modern cars like the BMW 740il use fuel injection technology in delivering air-fuel mixture to the engine. Through this device, the engine can burn fuel faster and more efficiently. As a result, the car gains more horsepower and torque. There's no doubt that the ultimate goal of a fuel injector is to enhance the overall performance of your vehicle. However, a few issues may arise at times that would affect your car in a very bad way. To diagnose injector-related problems, you need to be familiar with the following steps. These will help you determine the right course of action to take in order to restore your car's normal operation.

Fuel restriction

Fuel restriction is the culprit behind the poor performance of your engine. This happens when the valve of the fuel injector does not open or close the way it has to be. A faulty injector usually sends the wrong information to the car's ECU. This problem results in either excessive or inadequate amount of fuel delivered in the engine. To diagnose this probblem, check the BMW 740il fuel injector for clogs. A congested injector won't function normally. Try cleaning the injector first and see if you can restore it in good condition. Replace it if the problem still persists.

"Check Engine" light is on

This warning light is usually activated when there is a lean misfire. A misfire occurs when there's a huge amount of unburned fuel in the car's cylinders even after you shut the engine off. The oxygen sensor detects it as fuel waiting to be delivered into the engine. Because of this error in reading, the fuel injector remains open for a long time. The cylinders then receive uncontrollable amount of air-fuel mixture, which is very damaging to the car's combustion system. When this happens, you must perform a test using an automotive scan. Plug it while the engine is off. Observe the readings and wait for the code that points to fuel injector problems.

Overheating

A leaky fuel injector causes the engine to overheat fast. Cracks and holes on the injector allow unburned fuel to spill out and spread to the other components of the combustion system. Worse, it can damage the catalytic converter severely. To inspect for leaks, simply touch the engine parts nearby the fuel injector especially the cylinders. If you notice a lot of oil deposits, replace the injector ASAP to avoid further damage.