- 2002 ford 7.3 injector driver module removal upgrade#
- 2002 ford 7.3 injector driver module removal full#
If the concern is a no-start, remove the pipe plug in the top of the high pressure oil pump reservoir and inspect the oil level, which should be within one inch of the top. See my PowerStroke Page for the correct oil specs. The engine oil is therefore critical to engine operation.
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In effect the PowerStroke has eight 110 volt electronically-actuated and controlled injection pumps.
2002 ford 7.3 injector driver module removal full#
The PowerStroke uses engine oil under high pressure (400-500 psi at idle, up to 3600 under WOT full load) to pressurize and open the fuel injectors. Many problems can be traced to broken down, incorrect or low engine oil. The first thing to do if you have any driveabilty concern on a PowerStroke is to check the engine oil level. While important for a lack of power concern, I wouldn't perform a fuel pressure test for a miss-fire concern. I modify the order depending upon the concern. These tests are not in the original order as published by Ford, nor are they necessarily in the order in which I perform them. There is also a tool available from InterMotive INC. This is part of the PCM's adaptive strategy, or "learning" capability.Other tools you may want to make diagnosing this engine easier are a diesel compression gauge and long-reach adapter an infra-red "no touch" thermometer to find missing cylinders a 160 psi fuel pressure gauge for testing the lift pump a standard vacuum/fuel pressure gauge for manifold (turbo-boost) pressure and a 3600 psi hydraulic oil pressure gauge for diagnosing the high-pressure oil system. Strategic displays like MFDES will change as the PCM detects changes in sensor inputs which may indicate changes in environment, such as altitude, or wear in the engine. For example, the displayed duty cycle of the IPR may not match the actual duty cycle as viewed on a scope, or the displayed transmission control pressure output may not match the actual pressure on a test gauge. Some outputs may not match actual measurements. If there is an output device malfunction, the results may not be what the PCM is trying to achieve, but the output signal may still show normal. At an elevation of 5000 feet, BARO and MAP would be 12.1 PSI, so the MGP base line would be recaluclated to reflect 0 and not -2.6 PSI.Īll ouputs are functions that the PCM is attempting to perform based on the inputs it is receiving. At sea level, calculates BARO at 14.7 PSI, so a MAP reading of 14.7 equals 0 PSI MGP. For example, BARO is used to calculate MAP/MGP base line. In some cases, the PCM uses one voltage input to calculate a base line for other sensor readings. All readings which are not displayed in volts are what the PCM calculates those sensor inputs equal. One thing to understand and remember is the PCM reads only voltage signals from the sensors.
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By installing a 104-pin Break-out Box and using a DVOM or lab scope you can read most of the inputs and outputs in voltage or duty-cycle.
2002 ford 7.3 injector driver module removal upgrade#
If you are unable to upgrade the computer in a 94 truck, it is still possible to diagnose, just not as easy. This way not only are you able to retrieve trouble codes, but also run the injector buzz test, cylinder contribution test and monitor data stream and "snap shot" readings during a test drive. By manipulating the accelerator pedal during the KOEO test, it was possible to activate an injector actuation (buzz) test, but the best way to fully diagnose these is to replace the computer with a 95 level one. Unfortunatly, the 94 vehicles, while equiped with an OBD II data link connector, were actuatly EEC IV and had no data stream. The easiest way to diagnose the PowerStroke is with an OBD II scan tool that has data stream capabilities. I've broken this page down into the following sections:Īlso see my Bulletins Page for additional diagnosis and repair information and parts listing.įor older diesel diagnosis and repair tips see my 6.9/7.3 IDI Page. Over the past four years I have seen common problems and have come up with techniques for working on this engine. One of my primary tasks where I work is diagnosing PowerStroke driveability concerns. On this page I plan on posting diagnostic and repair procedures to help other technicians who may not be familiar with the Ford/Navistar PowerStroke. Diagnostic and repair tips for Ford PowerStrokes diesels