Ford 4.2L Index of Articles

How To Test The Alternator (1997-2002 4.2L Ford F150)

How To Test The Alternator (1997-2002 4.2L Ford F150)

You can test the alternator on your 4.2L V6 Ford F150 with just a multimeter. That's right, you can do it yourself and without any expenses diagnostic test equipment. The alternator test is pretty easy to do and you'll be able to accurately...   read more >>

Oxygen Sensor Heater Test -P0151 (1997-1998 4.2L F150, E150, E250)

Oxygen Sensor Heater Test -P0151 (1997-1998 4.2L F150, E150, E250)

Diagnosing the left front oxygen sensor (HO2S 21) and/or diagnostic trouble code (DTC) P0151: HO2S 21 Circuit Malfunction is not as hard as you might think. You don't need any expensive diagnostic test equipment... all you'll need is a...   read more >>

How To Test The Throttle Position Sensor (4.2L Ford F150, E150, E250)

How To Test The Throttle Position Sensor (4.2L Ford F150, E150, E250)

The throttle position sensor (TPS) is probably one of the easiest sensors to test on your 4.2L equipped Ford pick up or van. In this tutorial I'll show you how to test it with a simple multimeter (no scan tool required). The contents of this...   read more >>

Oxygen Sensor Heater Test -P0135 (1997-1998 4.2L F150, E150, E250)

Oxygen Sensor Heater Test -P0135 (1997-1998 4.2L F150, E150, E250)

Troubleshooting diagnostic trouble code (DTC) P0135: HO2S 11 Circuit Malfunction is not as hard as you might think. The cool thing is that you don't need any expensive diagnostic test equipment... all you'll need is a multimeter. A trouble code...   read more >>

How To Do An Engine Compression Test (4.2L Ford V6)

How To Do An Engine Compression Test (4.2L Ford V6)

Testing engine compression is probably one of the most over-looked tests when diagnosing a hard to find misfire or no-start condition. In this tutorial I'll show you how to do and interpret an engine compression test on 4.2L equipped...   read more >>

How To Test For A Blown Head Gasket (4.2L Ford F150, E150, E250)

How To Test For A Blown Head Gasket  (4.2L Ford F150, E150, E250)

You can test for the head gasket yourself since the tests are not hard to do. So, if your 4.2L Ford F150 (4.2L E150 or 4.2L E250) has suffered severe over-heating and you suspect you have a blown head gasket on your hands... this tutorial will...   read more >>

How To Test The Fuel Injectors (4.2L Ford F150, E150, E250)

How To Test The Fuel Injectors (4.2L Ford F150, E150, E250)

Testing the fuel injectors on the 4.2L Ford V6 engine can seem like one very impossible task. This is due to the fact that they're located under the intake manifold plenum and you need to remove the upper intake manifold plenum to reach them. If...   read more >>

How To Test The Fuel Pump (4.2L Ford E150, E250, F150)

How To Test The Fuel Pump (4.2L Ford E150, E250, F150)

Ford has made it easy to test the fuel pump on your 4.2L V6 equipped F150 (E150 and E250 van). This is due to the fact that Ford installed a Schrader valve on the fuel injector rail. It's to this Schrader valve that you and I can connect a fuel...   read more >>