Fuel Injector Noid Light Test (GM 2.2L)

What Am I Testing With The Noid Light?

OK, here's a little bit of working theory that'll help you to see the ‘why’ of the Noid light test.

Whether you're testing a no-start condition or a Misfire Condition, you'll need to know if the cause of the problem is a lack of fuel. When your GM 2.2L Cavalier (or Sunfire, or Sonoma, or S10 Pick up) does not start, it will be either because of a lack of fuel or spark. The same thing goes for when your GM 2.2L equipped car or pick up is misfiring, that specific engine cylinder isn't contributing to engine power because it either lacks fuel or spark.

Now, since the above two conditions (no-start and misfire) can be caused by any number of things, one of the things that has to be eliminated, from this list of possibles, is the fuel injector not getting power or the ON/OFF switching signal from the vehicle's computer.

Therefore, the purpose of the fuel injector Noid light test is to verify that the fuel injector is receiving power and the ON/OFF switching signal, since without any one of the two, that particular fuel injector will not work. This of course will cause a misfire condition, if this happens to one fuel injector, or a no-start condition if all of the injectors are not getting both of these Signals.

One thing to keep in mind, is that the fuel injector Noid light test does not test for a bad fuel injector. But, is the first step in verifying if the fuel injector is bad or not. For the fuel injector test for your GM 2.2L car or pick up, go down to the list of links at the end of this article.

Which Set Of Noid Lights Should I Buy?

There are lot of fuel injector Noid light sets to choose from and many places to buy them. I'm gonna' make two recommendations to you:

1) Which one to buy:  The fuel injector Noid light kit that I recommend is the Performance Tool W89501 10-Piece Noid And IAC Light Set, and here some reasons why:

1. This is one of the most complete Noid light kits on the market. It contains Noid lights for the different fuel injector connectors used on the majority of makes and models, since not all cars use the same fuel injector connector type.
2. The plastic case keeps all of the Noid lights organized and safe.
3. These tools are durable.
4. Price is right.

2) Where to buy:  I recommend buying it from Amazon. At Amazon is where I buy almost all of my tools. Yes, your local AutoZone, or O'Reilly or PepBoys auto parts store will have them but at a much higher price.

By clicking on the above images of the different Noid light sets, you'll go to Amazon's site where you can browse to your hearts content.

Related Test Articles

Now, if the Noid light tests on your Chevy (Cavalier, S10 Pick Up, or GMC Sonoma, or Pontiac Sunfire) indicated that everything is OK, and yet the car or pick up is still misfiring, the following articles might help:

• GM 2.2L Engine Compression Test.
• GM 2.2L Bad Fuel Injector Test.
• GM 2.2L Misfire Trouble Code Basics.
• How To Test The GM 2.2L Ignition Coil Pack (at: easyautodiagnostics.com).