6.0 possible injector issues

Discussion in '6.0L Powerstroke Diesels' started by 83ford, Nov 21, 2018.

  1. bismic1

    bismic1 Full Access Member

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    If the connector is fully plugged into the FICM, it is hard for me to believe that all of the wires in that harness are having issues. I guess it could happen.
     
  2. 83ford

    83ford ford diesel baby

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    It’s plugged back in now we pulled it back off and I messed with it so we’re back to the original over fueling and backfiring problem


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  3. 83ford

    83ford ford diesel baby

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    We have put a good ficm on it it can off a running truck


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  4. 83ford

    83ford ford diesel baby

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    The low voltage only happens after cranking for a bit.but where would I check that at? That very well could also be my battery’s I can’t remember if it does it when I hook the jumper cables up to it or not but here latley I just throw 2 sets of cables on it cause it’s takin so much to get it started


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  5. Crawler

    Crawler Supporting Member Supporting Member

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    I keep a spare new harness around for this reason. I have the connectors for the end of the harness as well. But by the time I charge $30+ for a connector and labor to swap the pins over, it’s almost as much as a new factory harness. I keep the plugs around in case I break a clip on one while doing work. Then it’s on me to fix it properly. Way too many shops just jam it back in and leave the mess for the owner to find way later.
     
  6. Crawler

    Crawler Supporting Member Supporting Member

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    You’re absolutely correct.

    It’s unfortunate that we lost Ron. His FICMs treated many people very well too.
     
  7. Crawler

    Crawler Supporting Member Supporting Member

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    Load test the battery’s. Then check the alternator. After that it becomes a lot of chasing and looking usually.

    Battery’s are the most likely reason. But a weak alternator isn’t uncommon.
     
  8. 83ford

    83ford ford diesel baby

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    The alternator showed to be chargin at 13.5 or so atleast on the scan tool. I can’t remember if the other ficm dropped Voltage when I was starting it or not.i do remember though that the voltage while running was actually better then mine but only like a volt higher I think it sat around 49 where mine sits at 47-48


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  9. Crawler

    Crawler Supporting Member Supporting Member

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    I’m not concerned about the voltage output of the FICM. I’m concerned about the low input to the FICM and ECM.
     
  10. Crawler

    Crawler Supporting Member Supporting Member

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    Keep in mind you’re asking the FICM to take the incoming voltage and push it up to 48v. Starting with lower than normal voltage, the FICM has to work harder to make the numbers.
     
  11. 83ford

    83ford ford diesel baby

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    I’ll try an load test them batteries tomorrow I figure there the culprit cause it didn’t start dropin that much till it had been cranked on a bunch when I had the hot start issue


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  12. Crawler

    Crawler Supporting Member Supporting Member

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    Make sure you disconnect the batteries. That way you can isolate them and load test them individually rather than as a system. If one is bad and one is good, then it may not fail a load test if they are wired together.

    Also if you replace one, it’s advised to replace the other.
     
  13. 83ford

    83ford ford diesel baby

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    Oh ya I always replace both batteries lol I’m used to the whole routine of replacing both at once with all the equipment I’ve got


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  14. Crawler

    Crawler Supporting Member Supporting Member

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    Odd I replied to this thread yesterday. But it isn’t showing on my end.

    Have you had a chance to load test the batteries?

    Did you install your new harness?
     
  15. 83ford

    83ford ford diesel baby

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    Yes load tested the batteries tonight and one showed bad and the other showed weak. But the one that was goin down to the bad side on the charger just to see if it’ll hold alittle juice.i think there gonna try and get the harness on tomorrow evening.i plan on changing both batteries anyways I just wanna see if I can bring um back to life first.


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