...Continued from the previous page.
Probe the Fuel Injectors two male Spade Terminals with the Multimeter Test Leads.
In case you're wondering... it doesn't matter which Test Lead (BLACK or RED) you use on which terminal on the Fuel Injector, since the polarity doesn't matter in a simple Resistance Test.
Write down the Ohms (resistance) value that your multimeter is registering on a piece of paper. Write down what engine cylinder that fuel injector belongs to, too.
The fuel injector resistance value will be around 11-18 Ohms. On your particular 2.0L (SOHC, DOHC) or 2.4L (DOHC), the actual value your multimeter registers might be a different. Don't fret over this and you'll see why when you interpret the resistance value of all four.
Now, repeat the above steps on the remaining Fuel Injectors.
Let's find out what your specific multimeter test results mean for your Neon (or Stratus, or Voyager, or Caravan, or Breeze, etc):
CASE 1: All four Fuel Injectors registered the same resistance values: This confirms that the Fuel Injector your are testing is OK.
Here's why: If any one of the Fuel Injectors were bad, you're Multimeter would've registered a completely different resistance value for that Fuel Injector. Since your Resistance (Ohms) Value were the same for all... this is an indication that the Fuel Injectors do not have an internal electrical fault.
CASE 2: One of the four Fuel Injectors registered a completely different resistance value: This indicates that the Fuel Injector is BAD. Replace the Fuel Injector.
You don't have to test them all, if you don't have to. This is especially true if you have a repair manual for your specific Chrysler 2.0 (SOHC, DOHC) or 2.4L (DOHC) and that repair manual has the fuel injector resistance specification.
The main reason I suggest you test them all is to avoid having to search for the resistance value, either online or in a book. Now, don't get me wrong... the more info you have at your disposal, the better. But, if you test them all... you'll find out what the average Ohms value is without having to look it up.
Finding the BAD Fuel Injector is not hard to do... if you have a specific diagnostic strategy. In this section, I'm gonna' share with you the way I diagnose a BAD fuel injector (and of course, you can modify my testing suggestion to fit you specific needs).
I first start by:
The above testing strategy may seem like overkill or too difficult... but it isn't. Most of the above tests can be done pretty fast and are not hard to do.
I can tell you from experience that the way to save yourself the frustration of replacing good parts, your vehicle doesn't need and that don't solve the problem, is testing everything. Thankfully, there's a test for just about anything on your car!
“For instance, on the planet Earth, man had always assumed that he was more
intelligent than dolphins because he had achieved so much —the wheel,
New York, wars and so on —whilst all the dolphins had ever done was
muck about in the water having a good time. But conversely,
the dolphins had always believed that they were far more
intelligent than man —for precisely the same reasons!”
The Hitchhiker's Guide to the Galaxy