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<h1>GM MAF Compatibility</h1> <div class="level1"> <p> <a href="/wiki/lib/exe/fetch.php?tok=29d797&media=http%3A%2F%2Fwww.ecmtuning.com%2Fimages%2Fphotos%2Fsidebyside.jpg" class="media" title="http://www.ecmtuning.com/images/photos/sidebyside.jpg"><img src="/wiki/lib/exe/fetch.php?w=317&h=222&tok=b8791a&media=http%3A%2F%2Fwww.ecmtuning.com%2Fimages%2Fphotos%2Fsidebyside.jpg" class="mediaright" title="www.ecmtuning.com_images_photos_sidebyside.jpg" alt="www.ecmtuning.com_images_photos_sidebyside.jpg" width="317" height="222" /></a>This page is intended to illustrate which GM MAF sensors work with our GM MAF cable and which do not. Please refer to the image to the right (<b>click image to enlarge</b>). </p> <p> The sensor on the left was pulled from an actual GM car. The sensor on the right appears to be a manufactured copy of some sort. </p> <p> The two are similar in many ways, but different in many others. Some are trivial, some are not. </p> <p> The first thing you'll notice is that the GM sensor has a real honeycomb screen intended to straighten the airflow through the metering elements. The aftermarket sensor simply has a chicken wire type screen that seems to only provide some crude protection from debris but does nothing to actually straighten the airflow. </p> <p> The second thing you'll notice is that the one on the left works with our GM MAF cable, but the one on the right does not. </p> <p> This gets a little more complicated, but the core problem has to do with some electrical characteristics that are different between these two sensors. Refer to the images below (again, <b>click image to enlarge</b>). </p> <p> <a href="/wiki/lib/exe/fetch.php?tok=5ffa96&media=http%3A%2F%2Fwww.ecmtuning.com%2Fimages%2Fphotos%2Fgmsensor.png" class="media" title="http://www.ecmtuning.com/images/photos/gmsensor.png"><img src="/wiki/lib/exe/fetch.php?w=401&h=217&tok=a8f11b&media=http%3A%2F%2Fwww.ecmtuning.com%2Fimages%2Fphotos%2Fgmsensor.png" class="media" alt="" width="401" height="217" /></a><a href="/wiki/lib/exe/fetch.php?tok=4b21dc&media=http%3A%2F%2Fwww.ecmtuning.com%2Fimages%2Fphotos%2Fnewsensor.png" class="media" title="http://www.ecmtuning.com/images/photos/newsensor.png"><img src="/wiki/lib/exe/fetch.php?w=390&h=217&tok=c06d07&media=http%3A%2F%2Fwww.ecmtuning.com%2Fimages%2Fphotos%2Fnewsensor.png" class="media" alt="" width="390" height="217" /></a> </p> <p> As you can see, the two signals are similar, but different enough to cause compatibility problems. We do not know how well these aftermarket sensors work with a real GM ECU. We suspect that they probably work fine, but they definitely do not work with our cables. </p> </div>