Ford 4.0L Index of Articles

Testing The Oxygen Sensors On Your Ford 4.0L

Testing The Oxygen Sensors On Your  Ford 4.0L

Testing the upstream oxygen sensors (O2S11 and O2S21), on your OBD II equipped 4.0L Ford Aerostar, Explorer, Ranger, or Mountaineer, can be accomplished in a few easy steps and in this article I'll show you how. As you might already be aware, if...   read more >>

How To Test For A Blown Head Gasket (Ford 4.0L)

How To Test For A  Blown Head Gasket (Ford 4.0L)

Checking whether your 4.0L Ford Explorer (4.0L Ranger, 4.0L Aerostar, or 4.0L Mountaineer) has a blown head gasket can be done with one of four different tests and in this article I'll show you how to do them and how to interpret the results you'll...   read more >>

How To Test The Alternator (Ford 4.0L)

How To Test The Alternator (Ford 4.0L)

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 equipment. In this tutorial, I'm gonna' show you how in a step-by-step...   read more >>

How To Test The Thermostat (Ford 4.0L)

How To Test The Thermostat (Ford 4.0L)

If you've been wondering if it's possible to test the thermostat (without replacing it on a hunch), the answer is YES! The thermostat can be tested while it's still on the engine. As you may already know, the thermostat will fail in one of two...   read more >>

How To Clean the Ford Mass Air Flow Sensor

How To Clean the Ford Mass Air Flow Sensor

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 contamination will rob you of gas mileage and performance. Not only that, in...   read more >>

How To Test Engine Compression (Ford 4.0L)

How To Test Engine Compression (Ford 4.0L)

A compression test will let you know if the hard to diagnose misfire (or rough idle) condition or no start condition is due to something wrong inside the engine (like worn piston rings or worn cylinder head valves). This article will help you to...   read more >>

How To Test The Coil Pack (Ford 3.0L, 3.8L, 4.0L, 4.2L)

How To Test The Coil Pack (Ford 3.0L, 3.8L, 4.0L, 4.2L)

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 test it on the car and without using a Scan Tool. The tests are fast and easy and I'll take you thru' the whole... read more >> (at: easyautodiagnostics.com)

How To Test The Fuel Injectors (Ford 4.0L)

How To Test The Fuel Injectors (Ford 4.0L)

Testing the fuel injectors on the 4.0L Ford fuel injected engines in the Explorer, Aerostar, Ranger and Mercury Mountaineer can be quite a challenge since three of them are under the intake manifold plenum. But once you get to them, the test itself...   read more >>

How To Test The Ford Mass Air Flow (MAF) Sensor

How To Test The Ford Mass Air Flow (MAF) Sensor

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 be done without a scan tool. All you need is a multimeter. I recommend using a Digital Multimeter but an Analog... read more >> (at: easyautodiagnostics.com)

How To Test The Starter Motor (Ford 4.0L)

How To Test The Starter Motor (Ford 4.0L)

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 responsible for your vehicle not cranking. This is a pretty easy test which only...   read more >>