GM 3.8L Index of Articles

The oxygen sensor on the 1993 3.8L equipped GM vehicles is a 3 wire sensor. In this tutorial I'll show you how to test it's internal heater with a simple multimeter. You don't need any expensive diagnostic test equipment and with the 3 basic...   read more >>

Troubleshooting a Misfire Condition or Misfire Codes (OBD II) on your GM 3.8L V6 equipped vehicle (Buick, Chevy, Olds, Pontiac) can be quite a challenge. Why? Because so many different things can cause a Misfire (also known as an Engine Miss or... read more >> (at: troubleshootmyvehicle.com)

In this test tutorial, I'll show you how to test the Mass Air Flow Sensor to see if it's bad (and lighting up the check engine light) or not. This MAF Test is done in 3 easy steps. All you'll need, to test the MAF Sensor (with this tutorial) is a...   read more >>

This tutorial will help you to do a Cylinder Balance Test on your 3.8L equipped Buick (Chevy, Olds, or Pontiac) car or mini-van. Why a Cylinder Balance Test? Because it's the best way to find a ‘dead’ Cylinder on your 3.8L V6 Engine if: Your car... read more >> (at: troubleshootmyvehicle.com)

This type of EGR valve has made the auto repair industry and GM a ton of money over the years, since it's prone to carbon blockage. Well the good news is that this is an EGR Valve and EGR Valve System that is very easy to test and diagnose and this...   read more >>

This article will help you to diagnose Diagnostic Trouble Codes: P0135, P0141, P0155, P0161 on your GM 2.2L, 2.4L, 3.1L, 3.4L, 3.8L, 4.3L, 5.0L, 5.7L. All of these Trouble Codes have to do with a malfunction in the oxygen sensor's heater or it's... read more >> (at: troubleshootmyvehicle.com)

Testing the alternator, to see if it’s the cause of your 3.8L GM vehicle’s No Charge Condition, is something that you can do in three easy tests. This article will show you how in a step-by-step fashion. All you need is a multimeter. This article... read more >> (at: troubleshootmyvehicle.com)

A Fuel Injector, on your 3.8L V6 GM vehicle (Buick, Chevrolet, Oldsmobile, Pontiac) can stop working and cause a Rough Idle and/or Misfire Condition if it doesn’t get Power (12 Volts) or it’s Injector Pulse Signal from the PCM. Of course, this will... read more >> (at: troubleshootmyvehicle.com)

Testing the starter motor on any GM 3.8L equipped car or mini-van (to find out if it’s the one causing your car or mini-van not to crank) can be done in two easy tests and in this article, I’ll show you how. With the step by step test instruction... read more >> (at: troubleshootmyvehicle.com)