Ford Coil Current RFI Test

If you’re having a hard time diagnosing a misfiring Ford, the task will be made a lot easier with the aid of a Snap-on lab scope and scan tool.

The software in the scope contains a specific test just for Ford vehicles and testing their coils – it’s called the Coil Current RFI Test. This article shows you how to get your scope and vehicle set up in order to run the test and get your results.

The test you need is in the Guided Component Tests section. Go to that, then Fuel Injection System, choose Ignition Tests, followed by Secondary Tests, and then select the Coil Current RFI Test option.

You will be advised to set the amp probe up at the 20 am setting then hook it around the coil on the battery’s positive side.

From there, pull the coil out, check it over to make sure that it’s not sparking on anything, then on your scan tool hit View Meter.

Start the car to generate a pattern on the meter, and if you need to you can also zoom out on the screen for a wider view.

Once the pattern is shown, you can scroll up in the background and take a look at an example of a good pattern before comparing it against what you are getting from your vehicle.

If you then go down a little further you will get an example of a bad pattern, which will show you instances of RFI spikes and bad noise.

If there are no spikes or noise artefacts in your pattern then this would indicate a good coil in the vehicle you’re working on.

This is a quick and easy test for you to carry out and it will really help you with your diagnostics.

See more articles on our News Center page.

Got Questions?

Get Answers Here
 
Car & Light Truck Diagnostics

Send e-mail
(800) 424-7226

 
Heavy-Duty Truck Diagnostics

Contact us here
(800) 311-5452

 
Request Product Information

Sign Up For Our Technical Help Articles Now!

 

Snap-on produces regular technical help articles based on real-world case studies by our team of experts.

Please tick the box below and enter your details to subscribe to our mailing list.

 Yes - please sign me up for your technical help articles

Name: 

E-mail address: 

If you would like to receive further e-mails from Snap-on about product releases, developments and promotions, please also click the box below.

Yes - I would like to receive further e-mails from Snap-on about product releases, developments and promotions

Your name and e-mail address will only be used for the purposes you have agreed to on this form. Your data will not be shared with any third parties. You can unsubscribe at any time by clicking on the link in our e-mails.

Snap-on Diagnostic Tools and

Repair Information

Snap-on is a trademark of Snap-on Incorporated.

All other marks are marks of their respective holders.

©2020 Snap-on Incorporated. All Rights Reserved.

Got Questions?

Request Product Information

Online Product Help Here

Contact Diagnostic Customer Care

Send e-mail

(800) 424-7226

Mon - Fri 6am - 5pm PST

 

Product Registration:

• US     • Canada

Cookie Settings