If a fuel injector Noid light kit is on your ‘must have’ tool list and/or buying list, you can buy it here: Performance Tool W89501 10-Piece Noid and IAC Light Set. So, fuel injectors are vital in the proper function of your car. And, are also one of the most common reason, why cars fail to start. As a result, of problems with the fuel injection system. Finally, using a noid light, can help you diagnose, some of the issues, common with fuel system problems. Making a homemade noid light is easy, and requires minimal materials. The basic items you need are a 12-volt bulb, a wire, and a male and female electrical connector.

Next, use the oscilloscope to find the injector’s switching frequency. This is typically around 5-15 kHz. Just replaced my heater core and will be uploading an updated short tutorial with pics to fill in the gaps with the other threads. Including dash removal... You can also use a 12-volt DC relay to control the noid light. This will allow you to turn it on and off from a remote location. Find a suitable 12-volt bulb. This can be an LED, an incandescent bulb, or an automotive-style bulb.

Using the Homemade Noid Light

Now my car won't start. It was intermittent, but now seems to be a permanent no starting issue. The car turns over just fine. It does attempt to run sometimes at low RPM, but struggles and dies. Once the problem has been identified and the repairs have been made, the Noid light can be used to confirm that the repairs have been successful. If the light is flashing when the injector is energized, it indicates that the repairs have been successful. If the light does not flash, it may indicate that the repairs have not been successful and further troubleshooting may be necessary. Frequently Asked Questions What is a Noid Light? All fuel injectors need power and a switching signal from the fuel injection computer. This little tool helps you to visually confirm that the fuel injector is getting both. Now, a fuel injector Noid light test won't tell you that the fuel injector is bad, but will confirm that it is getting power and the Switching signal (also known as the fuel injector pulse signal). Without any of these two signals, the fuel injector will not work. Next, cut a piece of heat shrink tubing about 1 inch long and slip it over one end of the wire. Now, use a lighter to shrink the tubing until it’s about 1/4 inch in diameter. Next, do the same thing to the other end of the wire. Do Noid Lights Work on Diesel? Not sure how I had any spark coming out of this thing at all. It must've burned up the last bit of copper when I was testing ... this was the last thing I thought of because the previous owner told me he had replaced all of the ignition parts just before I bought the thing a little over a year ago.

A Noid light is a diagnostic tool used to test electronic fuel injection systems. It is used to diagnose problems in the electronic engine control system. The Noid light consists of an LED light which is connected to a power source and a connector which plugs into an EFI system. When the light is illuminated, it indicates that the system is working properly. If the light does not come on, it indicates a problem in the system. What Materials are Needed to Make a Homemade Noid Light?Looks like I have the infamous adapter for the rotor. The push on distributor can't work with bolt on because the center pin is too far away and it has to shoot a bolt of lightning to reach causing it to burn up. The old distributor was bremi. It has a flat top. That’s how you tell the difference between the two types of distributors. And specifically for the push on.

I'm leaning towards the AFM, or that dealership fix I mentioned causing it to run way too lean, but was wondering if anyone knows from experience if that can cause a no start issue. Now your vehicle will be much more visible while driving at night, and you’ll be the envy of all your friends! So get out there and make some noid lights for everyone! If the noid light stays on, with the key on or when cranking. Then, chances are wiring on the ground side of the circuit, is either shorted out (shorted to ground). Similarly, the driver inside the computer is bad and the computer may need to be replaced. Locate the fuel injector that you are going to test and disconnect it, from its electrical connector. Incidentally, before I decided to put my own time and effort into this, we took it to a shop and they replaced one fuel injector (not sure which one they all look the same right now) and the also did a "clean fuel injectors by running the engine on pressurized injector detergent". So not sure if all the injectors are failing, clogging, etc. I have not done much research on reviving fuel injectors however I will if consensus is that I should either replace or repair fuel injector(s).

What Is a Noid Light and What Does It Do?

Now, if the Noid light did flash ON and OFF, it's always a good idea to test the fuel injector connector next to the one you just tested and compare both results. If all is good, both connectors should make the Noid light flash in the exact same way.

The spark plug cables are different between push on and bolt on rotors. The ends where they go into the dist cap is different and I believe at the coil also, so they're not physically interchangeable. I'm sure things could be adapted and I'm not sure there's any difference electrically, but it would be a headache if you got the wrong one. It is also possible to test the IAC on a noid light without removing it from the light. To do this, you will need to locate the two wires coming out of the IAC. What Does a Noid Light Test: Once all the components are connected, turn the key to the on position in the vehicle. The Noid light should come on, indicating that the power is flowing properly. If the light does not come on, there may be a problem with the connection or the EFI system. What are Some Common Problems That Can Be Detected with a Noid Light? The first step is to set up your injector pulse test equipment. This includes an oscilloscope, an injector, and a ground clip. The ground clip should be attached to the car’s chassis, and the injector should be plugged into the oscilloscope.

In Conclusion

Noid lights are used in traffic enforcement to detect the speed of oncoming cars. They work by bouncing a beam of light off the car and onto a photosensor. The photosensor then calculates the speed of the car by how long it took for the light to return. Noid lights are often used in speed traps, as they can accurately detect the speed of oncoming cars from a distance. This allows police to catch speeding drivers before they have a chance to slow down. Noid lights are also used in some automated traffic enforcement systems, such as red light cameras. Does the Ecu Control the Fuel Injectors? A fuel injector Noid light will help you to troubleshoot a misfire or a no-start condition or a bad fuel injector and is one of those MUST HAVE tools to diagnose the majority of fuel injected vehicles on the road today. Keep in mind that when you are testing with an automotive noid light, this test won’t tell you if your injector has gone bad. Rather this will tell you if your ECU or PCM is sending the signals needed for your injector to work correctly. The next step is to create the lighting circuit. This will involve connecting the battery to the LED light and then connecting the LED light to the switch. Use a breadboard and jumper wires to create the circuit diagram. If the Noid light flashed ON and OFF and this flashing was comparable to the fuel injector connector next to it, then this result indicates the fuel injector is getting power (usually in the form of 10 to 12 Volts) and that the fuel injection computer is providing a fuel injector pulse signal to activate it. Also, this test result eliminates the electrical end of the fuel injector circuit as the cause of the problem or misfire.