Best way to test an AFM is to probe voltage on the pin that sends variable voltage to DME. Resistance is a poor test on these AFM's and doesn't really help much but that voltage should be smooth.

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? There are many advantages to using an EFI system over a carburetor. The main benefits include increased fuel economy, increased power, and easier starting. How Do You Test a Fuel Injector with A Screwdriver? A Noid light is a simple and easy way to test a connector. It is a must-have tool for any electrician. What Is the Advantage of Efi Over a Carburetor? Again, you want the noid light to, blink constantly when cranking the engine over. This is a good sign. So, there you have it. Problem Solved !! or Now you know where to look next.

What Is a Noid Light and What Does It Do?

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? Attach the male and female electrical connector to the ends of the wire. Make sure they fit securely. 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.

Finally, pulse the injector at the switching frequency. You should see a spike on the oscilloscope screen. If you don’t see a spike, your injector is not functioning properly. If the Noid light DID NOT flash ON and OFF, this result indicates the fuel injector is either NOT getting power (usually in the form of 10 to 12 Volts) or that the fuel injection computer is NOT providing a fuel injector pulse signal to activate it. With this result, you have confirmed that the electrical part of the fuel injector circuit is at fault. In Conclusion Disconnect the electrical harness connector from the fuel injector and connect the noid light to the connector. After that, power up the ignition by turning the vehicle’s ignition key to the “on” position without starting the engine. The noid light should start blinking, indicating that the injector is receiving electrical signals. 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...Now, if the light did flash on and off, it’s always a good idea to test another fuel injector. In addition, to the one you just tested and compare both results. Summary: A noid light is a diagnostic tool used to test the electrical pulse signal sent to a fuel injector from an Electronic Control Module (ECM) in a vehicle. Making a noid light involves gathering the necessary materials and following a few steps to assemble the device. You will need an LED bulb, a resistor (approximately 220-ohm), a connector that matches your vehicle’s fuel injector harness, some electrical wire, heat shrink tubing, and a soldering iron. 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. The coil I bought was for the 14v upgrade I believe. It’s a silver Bosch coil with an orange top. It’s ohms right out of the box was 6300. 300 more than the spec in the Bentley recommends. Its resistance between the pos and neg polls is also out of spec. Not sure if that will wear other things out down the road. 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.