Ford 4.0L Index of Articles

This article will show you how to test the starter motor on your 4.0L Ford Explorer (or 4.0L Ranger, or 4.0L Aerostar, or 4.0L Mountaineer) to see if it's the one... [read more]

Testing the alternator on your 4.0L Ford Explorer, Aerostar, or Ranger or 4.0L Mercury Mountaineer isn't hard. The best part is that you don't need any expensive testing... [read more]

Troubleshooting and testing the throttle position sensor or Diagnostic Trouble Codes: P0121, P0122, P0123 on your 4.0L V6 Ford... [read more] at:

One of the most common problems, with MAF Sensor equipped Ford (Mercury and Lincoln) vehicles, is that the MAF Sensor’s Hot Wires will get dirty (contaminated). This... [read more]

Bench testing the Ford 4 or 5 pin relay is not hard to do at all, and in this article I'll show you how to do it (there are two... [read more] at:

In this article I'll shed some light on how to test and diagnose a Ford (and Mercury) V-6 Ignition Coil Pack. You’ll learn how to... [read more] at:

Every now and then, the need arises to bench test a Relay to find out if it's really bad or not. This article will help you to... [read more] at:

Testing the Ford Mass Air Flow (MAF) Sensor on all of the Ford, Lincoln and Mercury cars and trucks is a very simple test that can... [read more] at:

Testing the Ford Fuel Pump Relay on the car is not that hard to do. With the help of this ‘How To’ tutorial, I'll show you how to... [read more] at:

Testing the EGR system on your Ford, Mercury, or Lincoln car or truck is a pretty easy affair. You don't need expensive testing... [read more] at: