Help please - Ford Powerstroke Diesel Forum
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post #1 of 12 Old 08-02-2014, 07:41 PM Thread Starter
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Help please

Have 06 f250 about a month ago was driving truck and started running ruff thought injector dropped out then about 45 min later it came back and ran great till few days ago then did it again checked codes and got po283 hooked up to ae and ran tests number 8 injector will not buzz and ficm voltage runs about 47 at idle and drops to 45 then goes back up to 47 shut injector off and made no change in running what do you think is wrong is it injector or ficm please help
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post #2 of 12 Old 08-04-2014, 12:40 PM Thread Starter
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Does anyone have any input on which way to go on this problem
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post #3 of 12 Old 08-04-2014, 12:52 PM
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What is ae?
The injector should still work at 45v It may not work as good as it should but it will still work. Check to make sure the ficm is plugged all the way in also check to make sure the injector itself is plug in. If all thats good its either the injector or the injector harness.
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post #4 of 12 Old 08-04-2014, 01:39 PM Thread Starter
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Ae is auto enginuity scan software I have checked and made sure everything is plugged in
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post #5 of 12 Old 08-05-2014, 05:24 PM
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If it helps -I just fixed a no-start issue on my truck. No injector buzz, but no codes. Turned out to be a loose FICM connector. Must have been 1 of the 2 on the injector harness. Still can't believe that didn't set a single code. Maybe you have an open circuit in the wiring to #8, due to chafing? You can pull the plugs at the FICM, and look for around 0.5 Ohm across each of the two coils. Think you want middle X2 connector, pins 3 & 23, and 7 & 24

Last edited by reedgmi; 08-05-2014 at 05:28 PM.
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post #6 of 12 Old 09-01-2014, 06:20 PM Thread Starter
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I did check harness and checked ohms on injector I think my ficm is bad now it is throwing codes on #2,#1#7 injectors too and now truck won't start either while cranking check voltage with scan gauge and it dropped to 41 volts and 10 volts on logic side took ficm off and you can hear something rattling inside it
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post #7 of 12 Old 09-01-2014, 06:40 PM
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FICM

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Originally Posted by bigjeff View Post
I did check harness and checked ohms on injector I think my ficm is bad now it is throwing codes on #2,#1#7 injectors too and now truck won't start either while cranking check voltage with scan gauge and it dropped to 41 volts and 10 volts on logic side took ficm off and you can hear something rattling inside it
Unfortunately it does sound like a bad FICM, I had the same issue where it threw random Injector codes then it would clear itself and then have no codes at all but had all the same problems you are having. FMP never dropped below 47V but apparently a "part" of my FICM had burnt out. Dieseltechron or FICMrepair.com can fix 'em up good for ya.
Hopefully that's it
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post #8 of 12 Old 09-01-2014, 06:41 PM
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You can't just ohm the injector harness for a proper test. You need to be able to load each wire being ohmed since they carry 48 volts to injectors. I fought that for a while and the harness tested good. Ended up installing new harness and all is good. Swap in a known good FICM for a test.

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post #9 of 12 Old 09-02-2014, 03:48 PM Thread Starter
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I have checked harness for wire chaffing and haven't found any signs of that I have new ficm coming tomorrow I am going to put it on and go from there
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post #10 of 12 Old 09-03-2014, 01:42 PM Thread Starter
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Installed rebuilt ficm carries good volts now but still threw injector 2 high circuit code and number 7high circuit code please help
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