2003 7.3 wont start help please - Ford Powerstroke Diesel Forum
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Old 01-25-2014, 07:49 PM
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2003 7.3 wont start help please

im working on a 2003 7.3 for a friend of mine. the truck wont start inless the block heater is plugged in. ive checked the glow plug relay and its good and the glow plugs ohm out good also. i can plug up AE to it and i have around 10.7 volts while cranking, 2200ish psi ICP pressure, and a little over 200 rpms. the duty cycle for the ICP is around 40 percent also. does anyone have any ideas the truck acts like it want to start up but it wont it will just keep turning over and over. it is blowing white smoke out of the tailpipe so i know its getting fuel. any ideas where to look next would be appreciated.
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Old 01-26-2014, 03:44 AM
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2003 7.3

forgot to add that i have tryed swapping the ICP with another truck and also the IDM and nothing changed.
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Old 01-26-2014, 05:43 AM
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Buzz test the injectors when cold not only watch for codes but listen to the sound of the injectors. (Louder is better)
If the injectors are worn thinning the oil and a 140 volt dim will improve the condition.

Or simply pull the valve covers and measure armature clearances

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Old 01-26-2014, 06:09 AM
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2003 7.3

Buzz tested the injectors they all sound the same but not as loud as the 99 powerstroke I am working on. What are the armature clearance numbers and I will check them out?
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Old 01-26-2014, 06:26 AM
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Pull the coils. And see if a .0015" feeler gauge will fit between the armature and the upper body

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Old 01-27-2014, 03:24 PM
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2003 7.3

ok i only had time to get to the drivers side today and this were the results...

cyl 2- i could not get a .0015 feeler guage underneath
cyl-4- i could not get a .0015 feeler guage underneath
cyl 6- had .0015 clearance
cyl 8- i could not get a .0015 feeler guage underneath

i am going to try to get tho the other side in the next day or two but is that telling me its time for injectors due to a wearing poppet seat?

thanks
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Old 01-28-2014, 02:09 AM
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You guessed it

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Old 01-28-2014, 06:02 AM
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2003 7.3

What about this injector shim kit from rosewood diesel shop? Is that something you think would work or would you recommend new injectors?
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Old 01-28-2014, 09:20 AM
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Quote:
Originally Posted by cnorris07 View Post
What about this injector shim kit from rosewood diesel shop? Is that something you think would work or would you recommend new injectors?
it works great on AA and AO injectors but due to the tight tolerances of the AD and AE injectors it will more than likely set an engine light on decel. if you should choose to install shims don't go over 0.001" and ask Jim for advise. the best thing to do is pull the injectors and send them to him to have them properly machined/oringed/inspected. if the poppets are worn that much more than likely the springs, p&bs, check plates, and nozzles need attention also
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