Donate Now

February 21, 2023

Learn How to Do Fuel Injector Test!

Vehicles from the 80s and newer usually have complex electronic fuel injection systems instead of carburetors. The fuel injection system helps complete the combustion process by spraying the appropriate amount of fuel into the cylinder walls. However, as your fuel injectors age, they’ll start leaking fuel.

If you’re dealing with a bad fuel injector, don’t be surprised to catch symptoms such as white smoke, reduced gas mileage, poor emission, misfiring, erratic engine idling, or engine knocking. A failing fuel injector system can cause a fire outbreak if left unaddressed. Learning how to test your vehicle’s fuel injectors for leaks can go a long way in ensuring your safety on the road and keeping your engine in tip-top condition.


How to Check Your Fuel Injector for Leaks

STEP 1: Start your engine and let it run on idle before inspecting each fuel injector for leaks. If you notice signs of external leakage, be sure to replace your O ring.

STEP 2: Turn off the engine and ensure it sits in Park or neutral gear. Pop the hood and remove your negative battery terminal. If your air filter box is blocking the way, use a screwdriver to unscrew the fasteners that hold it.

STEP 3: Unplug your throttle socket or disconnect your throttle cable. You’ll want to remove all wires along the way carefully.

STEP 4: Disconnect the socket on your injectors, and be sure to unbolt the fuel rail before pulling the rail off with an injector remover. It’s best to leave the fuel lines on the fuel rail. Doing so delivers adequate fuel pressure from your fuel pump.

STEP 5: Grab a syringe that has milliliters and use it to measure the fuel’s pressure.

STEP 6: Use a multimeter to test the voltage on the injection sockets. Most vehicles have injectors with two pins. You wouldn’t want to see variations above 3.70 and 3.89.

STEP 7: Remove the fuel fuse and examine it. You should see PINs 87 and 30. It’s important to note that these main fuel lines and their numbers may not be like other vehicles. Be sure to contact the fuse to ensure your fuel runs steady.

STEP 8: Check the level of fuel that fills up the syringe as you send current to each injector. Take note of each injector’s spraying rate. You can fill it up to 50 ml to obtain a more accurate result.

STEP 9: Record the time it takes for each injector to fill the syringe. Your fuel injectors may leak if they’re spraying too much fuel or if you see large drops.


You Can’t Keep an Old Car Forever!

Does your vehicle have more issues apart from fuel leaks? Consider handing it over to us at Veteran Car Donations. We’ll turn your old and unwanted vehicle into a powerful tool for transforming the lives of struggling veterans in your community.

We’ll put it up for auction, with the proceeds going to our reputable charity partners. These veteran-focused IRS-certified 501(c)(3) nonprofit organizations are dedicated to supporting former U.S. service members who are homeless and impoverished, those who are unable to find decent jobs, and those who are suffering from disabilities and serious illnesses, including mental disorders.

Our nonprofit partners use the funding we give them to provide their beneficiaries with housing and financial assistance, employment and livelihood opportunities, family support, free quality health care and medical treatment, psychotherapy services, scholarships, and many other benefits.

In return, you’ll get a fast and free towing service from us anywhere in the country. Your gift to our veterans will also entitle you to claim the highest possible tax deduction in the next tax season. Best of all, you’ll experience the joy of knowing that you’re helping improve the living conditions of our beloved veterans.

We accept almost all types of vehicle donations regardless of their ages or conditions.

You can check out our FAQs page to get to know our quick and convenient donation process and other important information. If you have questions or concerns, feel free to call us through our 24/7 toll-free hotline at 877-594-5822 or write to us here.


Make a Hero Smile Today!

Your car donation will help disadvantaged veterans get back on their feet. Bring them the good news by calling Veteran Car Donations at 877-594-5822 or filling out our secure online donation form now!

Veteran Car Donations operates in all 50 states.

Donate Now

Or call (877) 594-5822!