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| 1994˝ to 1997 7.3L Power Stroke Diesel 7.3L Power Stroke Diesel equipped F-Series and F-Super Duty. |
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#1
Wed, February 10th, 2010, 10:24 PM
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There are a few things the 7.3L Powerstroke needs before it will start.
1. Battery voltage to be a minimum of 10.7 volts during crank. 2. High pressure oil at a minimum of 450 PSI during crank. a. The PCM will not even begin to command injection events without seeing this minimum pressure. If the injection control pressure (ICP) sensor is bad and the PCM never "sees" 450 PSI on this input, it will not command injector action. An easy way to test this is to simply disconnect the sensor. The PCM will then command an injector pulse width that correlates to 725 PSI of ICP. If it still doesn't start, keep looking.3. Fuel pressure. If there is no fuel pressure, then fuel will not be fed to the injectors. They may be actuated by the PCM but without sufficient fuel, there will be no combustion. 4. Camshaft position sensor (CMP) operation. This sensor is vital to the PCM operation because it's the only input to the PCM for engine speed....which it has to know for nearly every function it performs. I usually tell people to crank the engine for 8-10 seconds and see if there is any smoke coming out of the exhaust. White smoke signifies either inoperative glow plugs, low fuel pressure, or low compression. No smoke means that there is no fuel being injected. Either there's no RPM input to the PCM or there is no fuel being injected. By knowing what your tailpipe is telling you, we can take a direction from there. What have you got?
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Tuning, PCM flashing, and burning chips for 7.3s since 2008. Repairing all aspects of 7.3L Powerstrokes for 25 years. Eight 7.3L PSDs in the driveway including a 1994 Crown Vic and 1973 F100/2002 F350. Looking for the next victim. 
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#2
Fri, February 12th, 2010, 01:04 PM
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To answer one of the original questions, yes... we can reflash the 94 PCM with the 97 program to allow for proper OBDII Scantool functions. If this is what you'd like to do, we can certainly get you taken care of.
As to the rest, the guys have covered about everything you can check without a scantool. Best of luck! 
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Bill Cohron - The Mad Doctor   Power Hungry Performance - The ORIGINAL in Ford performance tuning... Since 1997! (678) 890-1110 www.gopowerhungry.com - Home of the Hydra Chip, Minotaur Tuning Software, and the new Orion Reflash System for Navistar! Bring back  Windows™ XP and 7.  Windows™ Vista and Windows™ 8 is a pain in my a$$!  Windows™ 10 is only slightly less annoying!  Windows™ 11 is garbage!  Much to my surprise, I'm actually quite enjoying Linux! 
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#3
Sun, February 14th, 2010, 01:30 AM
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I replaced my positive cable today with a larger one. I can say for sure that mine spins quicker and starts faster. The older your cables get they can get corroded, that increases the resistance thus lowering the voltage which will cause the starter to spin slower. I got mine locally for $100 and as said before its alot bigger. I had to work to get it in the battery to battery groove. If you want one let me know.
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Chuck 1992 Calypso Green Mustang notch 1995 Mustang GT 2004 Explorer Limited A veteran is someone who, at one point in one's life, wrote a blank check made payable to 'The United States of America', for an amount of 'up to and including my life'. That is honor, and there are way too many people in this country who no longer understand it. -Author Unknown
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#4
Sun, February 14th, 2010, 01:34 AM
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Here is some pics.
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Chuck 1992 Calypso Green Mustang notch 1995 Mustang GT 2004 Explorer Limited A veteran is someone who, at one point in one's life, wrote a blank check made payable to 'The United States of America', for an amount of 'up to and including my life'. That is honor, and there are way too many people in this country who no longer understand it. -Author Unknown
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