cummins isx cm871 not starting please help

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by wtokhi, Dec 15, 2019.

  1. wtokhi

    wtokhi Light Load Member

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    Hell everybody,
    Sorry if the story is confusing but it's what I'm getting from my drivers over in Phoenix in an 08 prostar , they stopped at the gate of a UPS warehouse and after they were ready to go in the truck wouldn't start back up, driver said truck was cranking very slowly and then it went to just clicking, they checked the connections at the batteries and tried giving the starter a couple whacks, they got another slow crank then back to clicks driver also said there was a burning smell, the voltmeter was reading thirteen, I coulda went out there myself as im qualified to work on it but I'm in Fontana, ca, I called a mechanic to go out there and he went ahead and changed the starter, but it was still having the same problem, he checked the fuses and relays and the cables and checked the batteries but it all came back good, I have no clue and can't see the truck but I'm going on my way right now to check it out before I have to get it towed, any input would help, I hope it's not hydrolocked or seized and hope it's something electrical, anything will help thanks
     
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  3. Roberts450

    Roberts450 Road Train Member

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    Slow crank then clicking sounds like its the batteries. When was the last time they where changed?? They might show good voltage but if they are low on amps they are bad.
     
    p608 and wtokhi Thank this.
  4. wtokhi

    wtokhi Light Load Member

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    Hopefully that's it, I'm almost there, thank you
     
  5. vic84

    vic84 Bobtail Member

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    did you ever fix it. im having the same issue.
     
  6. wtokhi

    wtokhi Light Load Member

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    sorry for the late response, had a baby born, yeah it ended up being very stupid, the ac compressor clutch was seized so the belt couldnt spin around it and wasnt letting the engine crank, what did urs end up being
     
    jsnell Thanks this.
  7. John E.

    John E. Light Load Member

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    A long shot, sometimes a starter motor can become loose, bolts in the starter become loose, at least in the 80' and 90's, on International's. Truck had the starter grounded through the alternator.
    If the starter got loose somehow, through vibration etc., the starter wouldn't ground properly and would blow your alternator. Not sure about the newer models on how they are grounded.
    Actually, at the time International was the only manufacture of big rigs that used this type of grounding system. May be helpful for you. Hope it is a quick fix for you Guys.
    Sounds more to be an issue with your batteries though.
     
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