Jeep 4.0L Index of Articles

Jeep PWM Fan Relay Test Troubleshooting an Overheating Condition

Jeep PWM Fan Relay Test Troubleshooting an Overheating Condition

This article will help you to diagnose the Pulse Width Modulated (PWM) Fan Relay on the 1999-2004 Jeep 4.0L Grand Cherokee SUVs and/or the Codes P1491 (Radiator Fan Control Relay Circuit). The dealer, at the time of this writing, will charge you... read more >> (at: troubleshootmyvehicle.com)

How to Troubleshoot a BAD Fuel Injector (Jeep 4.0L)

How to Troubleshoot  a BAD Fuel Injector (Jeep 4.0L)

Fuel Injectors rarely go BAD, but when they do, they will cause the Engine in your Jeep 4.0L Grand Cherokee (or Cherokee or Wrangler) to miss and/or idle rough. The really cool thing is that they can be easily tested with a Multimeter and this... read more >> (at: troubleshootmyvehicle.com)

How to do an Engine Compression Test (Jeep 4.0L)

How to do an Engine Compression Test (Jeep 4.0L)

An Engine Compression Test is fast becoming a key test in diagnosing a hard to troubleshoot misfire condition. In this article, you’ll learn how to do the Engine Compression Test and, more importantly, how to interpret the results of the Test on... read more >> (at: troubleshootmyvehicle.com)

How to Test the Oxygen Sensor Jeep 4.0L (O2S11)

How to Test the Oxygen Sensor Jeep 4.0L (O2S11)

The upstream Oxygen Sensor on your OBD II equipped Jeep 4.0L SUV can be tested, and in this article, I'll show you how in a step-by-step fashion. This article will help you to test the upstream Oxygen Sensor (commonly known as the O2 Sensor Bank 1... read more >> (at: troubleshootmyvehicle.com)

How to Test the MAP Sensor (Jeep 4.0L)

How to Test  the MAP Sensor (Jeep 4.0L)

The Manifold Absolute Pressure (MAP) Sensor on your 2.5L, 4.0L, or 5.2L Jeep Grand Cherokee, or Wrangler, or Cherokee, can be tested with a Multimeter and a Vacuum Pump. You don’t need a Scan Tool! So if a Diagnostic Trouble Code P0108 (OBD II... read more >> (at: troubleshootmyvehicle.com)

Blown Head Gasket Troubleshooting Tests (Jeep 4.0L)

Blown Head Gasket Troubleshooting Tests (Jeep 4.0L)

This article will present you with the three most common ways to test for a Blown Head Gasket on a Jeep 4.0L inline 6 cylinder engine. Here are the contents of this article at a quick glance: HEAD GASKET TEST 1. HEAD GASKET TEST 2. HEAD GASKET... read more >> (at: troubleshootmyvehicle.com)

How to Bench Test a Starter Motor (Step by Step)

How to Bench Test a Starter Motor (Step by Step)

Bench Testing the Starter is the most effective way to find out if the Starter Motor is in fact BAD. This is an easy test that you can accomplish yourself without having to take the Starter Motor to AutoZone or O’reilly or Pepboys Auto Parts. This...   read more >>

How to Test the Crank Sensor Jeep 4.0L (1997-2004)

How to Test the Crank Sensor Jeep 4.0L (1997-2004)

So many things can cause your Jeep 4.0L SUV not to start... and the Crank Sensor is one of them. Now, to make sure that the Cranks but Does Not Start problem is truly due to the Crankshaft Position Sensor... you need to test it, and in this... read more >> (at: troubleshootmyvehicle.com)

Fast and Easy On Car BAD Alternator Test (Step by Step)

Fast and Easy On Car BAD Alternator Test (Step by Step)

This is the EASIEST on car test for testing a BAD ALTERNATOR! If you've been wondering how to test the Alternator on your car... this is the test to do. It'll help you to diagnose a BAD Alternator in a pinch. It's a fast test and more importantly...   read more >>