Ford 4.0L Index of Articles

1992-1994 4.0L Ford Explorer, Ranger Ignition System Wiring Diagram

1992-1994 4.0L Ford Explorer, Ranger Ignition System Wiring Diagram

Here's a simplified ignition system wiring diagram of the 1992, 1993, 1994 4.0L Ford Explorer and 4.0L Ford Ranger. You'll find part two in the next page. The ignition system, on these particular vehicles, is a Waste Spark System. Which in plain...   read more >>

1994 Ford 4.0L Explorer And Ranger PCM Pin Out Chart

1994 Ford 4.0L Explorer And Ranger PCM Pin Out Chart

The 1994 4.0L V6 Ford Explorer/Ranger is equipped with the E.E.C IV system and so its computer has 60 pins. Whether you're tracing down an electrical short or testing one of the input/output components of the PCM, pinout charts come in handy....   read more >>

How to Test the Ford EGR Valve EGR Vacuum Solenoid, DPFE Sensor

How to Test the Ford EGR Valve EGR Vacuum Solenoid, DPFE Sensor

Testing the EGR System on your Ford, Mercury, or Lincoln car or truck is a pretty easy affair. You don't need expensive testing equipment to do it and more importantly, with this article you'll be able to find out exactly what part (of the entire...   read more >>

1992-1994 4.0L Ford Ranger Starter Motor Circuit Wiring Diagram

1992-1994 4.0L Ford Ranger Starter Motor Circuit Wiring Diagram

This wiring diagram applies to the 1992, 1993, and 1994 4.0L V6 Ford Explorer and 4.0L V6 Ford Ranger. My intention, in creating this wiring diagram, was to have something easy to read.. and hopefully I...   read more >>

How to Bench Test a Ford Relay (Large Relay)

How to Bench Test a Ford Relay (Large Relay)

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 articles in site about bench testing a Ford Relay, you can find the other here: Bench Testing a Ford Relay -A...   read more >>

How to Test the TPS (1991-1995 4.0L Ford Explorer)

How to Test the TPS (1991-1995 4.0L Ford Explorer)

The throttle position sensor on your 1990-1995 4.0L Ford Explorer, Aerostar, or Ranger can be tested very easily and without an expensive diagnostic scan tool. All you need is a multimeter. In this tutorial, I'll show you how to test it in a...   read more >>

Bench Testing a Ford Relay (A Step-by-Step Guide)

Bench Testing a Ford Relay  (A Step-by-Step Guide)

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 bench test the Ford 20 amp multi-purpose Relay in a step by step fashion (there are two articles in site about bench...   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 >>

How to do a Fuel Injector Resistance Test (Ford 4.0L)

How to do a Fuel Injector Resistance Test (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 >> (at: troubleshootmyvehicle.com)

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 >>