Jump to content

a little problem

Posted

Having cold start issues not that it's taking longer to start but it pops off to the normal  800 rpms but then a split second later it drops to 500 or so and sounds like it might die. Then come back up and never does it again just when it sits over night. if I plug it in it doesn't have this it starts just fine 

     When I get to 190 and shut the truck off and restart the truck it's fine. The only this different I have different if instead  of the puff of black Smoke it is more of a gray. The only code I have is po602 and the could be from the superchip I have.

   I haven't looked into it to much because I really have no idea where to start. Would like to figure it out before it starts getting below 0 right now it's around the teens at night and the around freezing during the day. Any help as always would be appreciated 

 

  • Replies 24
  • Views 4.1k
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Most Popular Posts

  • Buzzinhalfdozen
    Buzzinhalfdozen

    http://custombatterycables.com/ I've heard good things about these guys.  If the cables are in good shape but the ends are junk you could go this route.  Also I wasn't impressed wi

  • Mopar1973Man
    Mopar1973Man

    Typical HVAC removal. This is only a 1.5 to 2 hour job now for me.

  • klcammie
    klcammie

    Just like what I did. This is a good thing. I got the info from this site. Liked it so well did wife's toy and a friend's ford. Am now rebuilding a 2N ford tractor and will do batt cables the same.  

Posted Images

Featured Replies

It sounds to me like your batteries might be getting weak or the battery cable ends need to be cleaned up.

The grid heaters put a big draw on the batteries before you start it, then the starter draws them down some more. Then right after it starts the grid heaters kick on again further dragging down the batteries.  So basically the battery voltage is getting low and your ecm isn't happy about it until the alternator can catch back up. 

  • Author

I did check the cable ends they were tight and looked clean i never thought of the batteries I have no idea how old they are. know one marked the sticker on them, might have to get them tested.

It sounds like you could have grid heater problems, like if it's even comming on at all. Do you notice a big drop in volts on your gauge with key on before starting. 

My grids are disconnected for now and mine acts similar to what you are describing. Never looked at the tack to see it it was dropping but it does sound like it. I have not seen many cold days yet this winter.

  • Author

Yes The gauge drops and when it's running the lights dim so I no they are working.

2 hours ago, catnhat said:

Yes The gauge drops and when it's running the lights dim so I no they are working.

Sounds like a combination of weak batteries and possibly a weak alternator. I have a higher output alternator and even with the load it's not that much of a reduction in RPM.

  • Author

Going to test the batteries tomorrow that seems like a good place to start. I hope that's all it is 

  • Owner

Battery cables. I will bet the cable are tired. Here is what I've got parked in the shop. I wonder how people get away with this? :shrug:

Look at that positive terminal. It a clamp on junk terminal. The core of the main cable is corroded. More accessory junk tied to the terminal. Secondary cable is just as rotten. Please people take the time to take care of your cables.

DSCF6750.JPG.3999b387b63878536dd0161dab8

  • Author

O no mine look nothing like that I clean mine at least once a year. I tested my batteries  with something that looks like a cheese grater and it said both of them where good. Not sure of accurate it istl thats just what they use at work

Mike, is there a particular manufacturer of Cummins battery cables that you recommend? I was going to make a set for mine, but if they can be purchased reasonably, I'll do that.

  • Staff

Amazing  battery/ cable condition shown above........ Did the owner pop the hood and go,'' Merry Christmas'' Mike.:whistle2: 

Edited by JAG1

  • Owner
39 minutes ago, JAG1 said:

Amazing  battery/ cable condition shown above........ Did the owner pop the hood and go,'' Merry Christmas'' Mike.:whistle2: 

Actually he said, " Merry Christmas I'm on my way to Arizona and my heat core had died. I Need the truck by the time I return on Monday.

  • Staff

 Wow, I thought my dash was full of dirt on my work truck....

I'm going to have you do that on my 02

For Christmas, I get time off and the 3 daughters come over for a huge meal. it is so great.... slept almost the whole day yesterday after much work and travel time ea. day.

17 hours ago, Dynamic said:

Mike, is there a particular manufacturer of Cummins battery cables that you recommend? I was going to make a set for mine, but if they can be purchased reasonably, I'll do that.

http://custombatterycables.com/

I've heard good things about these guys. 

If the cables are in good shape but the ends are junk you could go this route. 

image.jpeg.b9cdbcc5bc6f2503e082f4f99fde1

Also I wasn't impressed with liquid tape in the pic so I peeled it off and used heat shrink. 

    • Like 3

    I am using the same military style clamps as you and they do work very well. I have also started using motor oil on them and have had almost 0 corrosion on any of them.

    The thing i like about the clamps is you cont have to mess with them to disconnect the batteries. I have a tendency to over tighten them and with these it is not an issue. 

    • Author

    Tried taking a picture of mine can't seem to load them but they look clean and oem clamps. they are centennial 27/75 batteries which seem to be 700 cca 875 ca AND 1005 HCA

    Go to topic listing