How can i check my injectors

Let your mechanic know that you were able to identify the injector with a power issue. Part 3. Connect a test light to the positive terminal of the battery. Take the same test light that you used for the previous test, but this time connect the alligator clip to the positive terminal on the battery instead of the negative.

Make sure the alligator clip has secure, metal on metal contact or the test light will fail to function. Have a friend start or turnover the engine. Have a friend start the engine. Make sure you do not have any clothing or body parts hanging into the engine bay as it starts or turns over. Only attempt to turn it over with the test light in place. Probe the opposite wire with the test light. Use the test light and check the opposite wire of the constants you identified in the previous test.

Press the sharp end of the probe through the rubber coating firmly until it makes contact with the metal wire inside. Be careful not to press the probe all the way through the wire and out the other side. Look for flashing or flickering light. With the engine running at an idle, the test light should flicker dimly and as your helper applies throttle by pressing the gas pedal, the light should flicker more brightly.

This light represents the signal being transmitted by the ECU to the injector to spray fuel. If the test light is failing to light up, the injector may be bad or there could be an issue with the electronic control unit for the vehicle. This issue could be caused by a failing ECU, or one of the injectors along the fuel rail may be faulty.

The electrical pulse is transmitted through each of the injectors to one another, so one faulty injector could cause issues in multiple injectors. Disconnect the wiring clips to each injector and begin the test again. With none of the injectors connected, the flickering pulse should transmit through all of the wires without any issue.

Use the test light to confirm this on the wire for the last fuel injector clip at the end of the fuel rail. Keep the test light connected as you reconnect each fuel injector one by one. As you connect each injector, the pulse intensity should remain the same. You can purchase new fuel injectors for your vehicle at most auto parts stores. Will my fuel injector ever need to be replaced, or can I just keep cleaning it?

A fuel injector can be cleaned many times, but it will eventually wear out and need to be replaced. Fuel injectors in cars typically last between 50, and , miles. Not Helpful 10 Helpful My car loses power when driving uphill and when I check the fuel injectors by pulling off the switch from ignition coil pencils, one didn't change the engine idle, what causes it? Check the intake and cylinders as they might stop the power from increasing uphill.

Not Helpful 8 Helpful I am getting 5 misfire error code. I switched the spark plugs and wires and still received the same code.

Could the injector be bad? There are a number of issues that may cause a misfire in your engine. A faulty ignition coil could be failing to transmit power to the spark plugs that you replaced, but a fuel injector could also be the culprit. Not Helpful 13 Helpful It could be that the fuel pump itself is not holding residual pressure when turned off.

Listen for a "click" sound coming from the pump when you key the car on. You can also try cycling the key between off and run several times to allow the pump to prime the fuel lines. Not Helpful 19 Helpful It depends on the age of your truck. Back in the 's automakers began using electronic ignition and electronic fuel injection in order to meet emissions and fuel efficiency standards.

Older cars had electromagnetic parts that would wear out and need to be replaced. The fuel injectors in your diesel engine are vital to the operation of your vehicle. When they function properly, you enjoy a smooth-running vehicle that gives you all the power you need for getting around and getting things done.

In this article, we will teach you how to test your fuel injectors. Your approach will depend on the type of fuel injection in your vehicle. If you have a throttle body injection TBI system, begin with these steps:.

The next steps apply to a TBI system injector that is completely clogged or not functioning, as well as vehicles that utilize electronic fuel injection EFI systems. This is where that long screwdriver or metal rod comes in.

This can be very frustrating, especially considering the thought you put into opting for a diesel engine. With our tips, you can quickly learn how to test fuel injectors in only 30 minutes. Knowing how to test fuel injectors is a fairly simple process that can help you diagnose any problems with your fuel injection system. In these instances, there could be something wrong with a peripheral system, or the injectors can appear alright but have something more subtle going on.

They can cause the needle on the tachometer — the gauge that displays the vehicle's RPM — to move unpredictably. You may notice the needle moves unprompted, indicating changes in RPM when your car isn't switching gears.

Fuel injectors deliver gas to the appropriate cylinders. That's Job 1. And when Job 1 isn't getting done, your engine won't receive its crucial combination of air and fuel. When the ratio of air and fuel in your engine is off, your motor may not generate the combustion it needs to operate. It's rare, but in some cases, fuel injector issues can lead to engine failure that prevents your car from starting.

It's also possible that your car won't start because, um, you forgot to put gas in it. It happens to all of us! Unfortunately, running out of gas can also lead to fuel injector issues.

If you think your fuel injectors need a little attention, visit your nearest Firestone Complete Auto Care.

A Complete Vehicle Inspection can help identify and remedy any issues giving your ride a hard time. Blog Categories Blog Home. Fuel Injector Basics This might be the first time you've heard of fuel injectors, and that's okay. Here's a general idea of how the whole fuel system works. The ECU engine control unit uses sensors to work out the right time to fire the injectors and spray fuel into the combustion chamber.

When the ECU activates the injector, pressurised fuel is sprayed into the combustion chamber through the nozzles. Because the nozzles are so small, the fuel is atomised, which makes it burn more efficiently. Signs and Symptoms of a Faulty Fuel Injector Sometimes fuel injectors can develop faults which impact on their performance or cause breakdowns. Check Engine Warning Light The most common sign of a bad fuel injector is the check engine warning light, which appears on the dashboard.

Misfiring or Vibrating Engine Does your car often misfire? Engine Stalling Does your engine randomly stall or cut out without you doing anything to cause it? Fuel Leak If you can smell fuel strongly while driving and your car is exhibiting other symptoms on this list, you might be looking at a fuel leak.

Poor Fuel Economy A faulty fuel injector can lead to a significant drop in fuel economy. You may experience poor fuel economy when the injectors are clogged or leaking.

Failed MOT for Emissions Reasons With thousands of vehicles failing the MOT for emissions reasons, drivers need to do all they can to reduce the volume of harmful emissions their car is producing before their MOT — and making sure the fuel injectors are clean and well-maintained plays a big part in this.

Maintaining Fuel Injectors The simplest way to clean and maintain fuel injectors is by using Redex fuel system cleaners.