What Causes Fuel Not To Get To Injectors?

Do you ever notice your engine stall intermittently or rough acceleration? Then assume the fuel injector doesn’t get enough fuel. When fuel is not entering the fuel injectors, you will notice some wired and unwanted issues. However, what causes fuel not to get to injectors?

There are several reasons for not getting fuel to injectors. The main and most intriguing causes for this problem include clogged injectors, blown EFI, bad ignition module, inappropriate wiring, defective ECU (probably), etc. There are some more causes that will come next. Check them first when this happens.

Indeed, the problem is not ignorable and silly. Therefore, you should focus more on it and don’t be late to fix it soon. Otherwise, the car will be damaged forever. So don’t skip reading this article. Read carefully and know everything.

Possible causes for fuel not getting to injectors with troubleshooting tips

What causes fuel not to get to injectors

Modern electronic fuel units are critical and complex in nature. Therefore, you will face trouble now and then. Eduardo Ruelas, an experienced automotive mechanic with 12 years of experience discloses some common yet major causes for this issue. In this section, they will be discussed elaborately.

Cause 1: Blocked or clogged fuel injectors

The first reason for this issue is blocking or clogging the fuel injectors. Well, it is a typical phenomenon that the fuel injectors get clogged and the fuel is stuck at one point. This way fuel can’t enter the fuel injectors and engine as well.

As fuel injectors inject and atomize the fuel into the combustion chamber of an internal engine, perfect fuel injectors are essential. But when the injector is blocked, the fuel or any essential materials can’t get to the engine.

Consequently, the engine can’t get enough fuel/fluid to ignite. Thus, there are no sparks to provide sufficient power. So when you inspect if there is a problem in starting or ex[erience rough idle, check whether the fuel injectors are blocked or not.

Possible solution: Remove the fuel injector and unclog or unblock it. If you are not a pro here, take it to an expert mechanic and leave it for that individual.

Cause 2: Blown EFI

Blown EFI

Electronic fuel injection is crucial when it comes to injecting fuel evenly and directly. It allows the engine to start easily and gives more consistent power. But when feeling a lack of power, assume that the  EFI unit does not work efficiently.

Therefore, this is the second most inspected cause for this issue. Also, fuel efficiency will be reduced for bad or blown EFI. resulting in, you see rapid emission or low fuel efficiency.

Possible solution: Admit it or not, EFI plays a crucial role to increase performance by providing higher power and torque.

Cause 3: Defective ECU

Eduardo Ruelas said that this is perhaps a reason for this issue. The engine control unit controls the overall engine functions. It assists to recognize the sentinel data and send it to the engine. But unfortunately, when it provides inconsistent data or information, fuel injectors don’t get enough fuel to ignite.

As it works for the engine and it performs according to the data provided by ECU, the engine can’t function for others. As a result, fuel can’t enter the injectors.

Possible solution: If the Engine control unit gets bad or functions incorrectly, the engine receives inaccurate data. Therefore, you should inspect the problem and take your car to the nearest dealership and tell them about it. You can also take the car to a garage and tell them to check thoroughly.

Cause 4: Lousy ignition module

Do you notice the engine is misfiring or has inconsistent ignition timing? Understand there is a problem with the ignition module. You can also experience rough running or poor acceleration even if the engine runs properly. Most alarmingly, the fuel can’t get into the injectors which cause severe damage to the engine and other components.

Possible solution: Check and inspect the ignition module coil. If it gets worse, change it and replace it with a new coil. Or, check the nuts and bolts and if they are loose, tighten them.

Cause 5: Defective wiring

If the wire is not wired accurately, the injectors fail to collect the fuel. As a result, you notice poor fuel efficiency and engine misfires. It also resists the fuel injector to get sufficient power to operate delicately. It is because the fuel injector is not getting the right amount of fuel. So it is crucial to check the faulty wiring and fix it soon. Otherwise, you feel the engine stalling or failing to start.

Possible solution: Check the wiring connection that is connected to the fuel injectors. If you can’t, know this matter. And let this issue be fixed by an experienced mechanic. Also, ensure the fuel injectors are receiving the correct voltage.

Cause 6: Low pressure at the fuel feed line

If the fuel pressure level is low, the injectors will not be going to receive fuel. You will experience unresponsive throttle, hard starting, engine stalling, worn spark plugs, poor engine performance, etc. However, this causes fuel not to get right.

Possible solution: The fuel pressure can be low for several reasons. So first, you need to inspect the reason and then jump to the fixing. The possible reasons are a faulty regulator, the fuel pump function being incorrect, etc. So after inspecting, fix them by taking help from an expert.

Cause 7: Leakage on fuel injectors

The final but not least reason for this problem is the leakage fuel injector. When the fuel injector leaks, the fuel starts to thin. It damages the engine bearing and heated up the cylinder side walls.

Possible solution: It is wise to change the leaking fuel injector and replace it with a new one.


Getting the right amount of fuel to the fuel injector is crucial to get the utmost performance. But when the fuel injectors can’t get accurate fuel, it stops working, and thus, the engine fails to work.

So knowing what causes fuel not to get to injectors is mandatory. The main causes can be clogged fuel injectors or faulty EFI or ECU. But you should inspect deeply and as a last resort, consult with an expert mechanic and get the solution.

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