GM 2.4L Index of Articles

Quite a few things can cause your car to not start and a failed fuel pump is one of them. The cool thing is that you can easily and quickly check the fuel pump (to see if it's bad or not). Why? Because GM has installed a Schrader valve on the fuel...   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 >>

You'd be surprised just how easy it is to diagnose a bad fuel injector on your 2008-2010 2.4L Ecotec equipped vehicle. For the most part all it takes is a simple multimeter resistance test. In this tutorial I'll show you how to do it in a...   read more >>

It is possible to test the oxygen sensor on your GM 2.4L Quad 4 vehicle before buying it, and in this article I'll show you how to do it. Being able to say “YES, the O2 sensor is BAD or NO, it's OK” will save you some time and money,...   read more >>

I can still remember the first time a Quad-4 equipped GM came into the shop (where I worked) and thinking what a pain in the neck it would be to work on it... after this first impression and as the years and experience accumulated I can tell you...   read more >>

Overheating is the number one cause of a blown head gasket on a 2.4L Quad 4 equipped Buick (or Chevy, Olds, Pontiac) car. If you think that your car has a blown head gasket, this article will help you to find out with three fast and easy...   read more >>

Knowing how to do a manual cylinder balance test (when trying find the misfiring cylinder on your Quad-4 equipped GM vehicle) is gonna' save you a lot of time and frustration when the PCM refuses to give you a specific misfire trouble code. Why?...   read more >>

Troubleshooting a misfire (P0300, P0301, P0302, P0303, P0304) or rough idle condition on your Quad 4, whether it's a Chevy, or a Buick, or a Pontiac, or an Olds, can be a challenge that can have you pulling out your hair (I know from first hand...   read more >>

Testing a cranks but does not start condition on your GM 2.3L or 2.4L Quad-4 engine isn't as hard as you might think. In this tutorial, I'll explain the basics of what causes a cranks but does not start condition and the basic tests you can do...   read more >>