Chrysler 3.9L Index of Articles

The PCM has 3 connectors and are color coded (black, white, and gray). Each connector has 3 rows of slots for a total of 32 slots (terminals). IMPORTANT: The following... [read more]

The throttle position sensor, on the 1997-2003 3.9L V6 Dodge Ram 1500 Pickup/Van, is a simple 3 wire component that can easily be tested with a multimeter. In this... [read more]

The fuel injection computer (known in tech speak as the PCM = Powertrain Control Module) is located on the firewall (passenger side) of your Dodge Ram pickup. The PCM has... [read more]

If you suspect that the camshaft position (CMP) sensor, on your 1996-1997 3.9L Dodge Ram pickup, is bad and causing a no-start problem or a trouble code P0340, then this is... [read more]

The PCM has a 60 pin connector and on the back side of the connector (wire side) are embossed a few numbers to further aid you in correctly identifying the pins... [read more]

The manifold absolute pressure (MAP) sensor, which is located on the throttle body, can be easily tested with a multimeter. Yup, no scan tool required to find out if it's... [read more]

There are 4 tests that are done to test for a blown head gasket. 2 of those 4 tests require no tools at all to peform. In this tutorial I'll explain how to do all 4 so... [read more]

Testing the camshaft position sensor, which is located inside the distributor, is not difficult at all. The cool thing is that you don't need any expensive diagnostic... [read more]

Engine compression problems can cause a no start problem or a rough idle/misfire problem. The cool thing is that testing and interpreting an engine compression test is... [read more]

The throttle position sensor is probably one of the easiest fuel injection system components to test and you don't need any expensive test equipment to do it. In this... [read more]