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Problem with my m38

Discussion in 'Flat Fender Tech' started by Bill F, Jul 2, 2012.

  1. Jul 2, 2012
    Bill F

    Bill F Finally running

    Hillsboro NH
    Joined:
    Sep 22, 2002
    Messages:
    588
    Posted: Mon Jul 02, 2012 9:01 pm Post subject: Still having Problems with My m38
    Ok I thought I had my jeep fixed. Seems my ignition switch was faulty causing some of my problems. I changed it out for a keyed civvy switch that just has on and off. Ran fine all weekend. It did spit and sputter when going down hill with my foot off the gas but it has always done that.

    The new problem. I drove it about 12 miles tonight to get ice cream, ran fine all the way. Was at the place probably a half hour. I started it and the idle was a little rough hit the gas and it would smooth out. Pulled out onto the main road was shifting into 2nd and the engine died put quickly restarted it self, it did this two more times until it reached operating temp then is was fine all the way home. When I pulled it into its parking space it was idling rough again. Turned it off and went inside. About an hour later I took it to run an errand about a mile from my house. It did the same thing again. I stopped at the store, picked up what I needed went back out to the jeep and it ran fine on the mile drive home, idle however was rough again when I went to park it.

    I have replaced the points, condenser, and coil. I triple checked that I had the points adjusted correctly.

    My ideas what could be wrong let me know what you think.

    1) Plugged fuel filter
    2) Fouled plugs
    3) Bad coil
    4) Valves out of adjustment (they don't seem to be making any more noise then when I first rebuilt the jeep)
    5) Something with the carb
    6) something with the fuel pump
    7) ??????
    8 )Just shoot the thing and bury it in an unmarked grave
     
  2. Jul 2, 2012
    nickmil

    nickmil In mothballs.

    Happy Valley, OR
    Joined:
    Sep 23, 2002
    Messages:
    12,529
    Sounds like a carb issue. I'd check for vacuum leaks first and remove the idle mixture screws, spray some good carb cleaner like Berrymans through the passages, and blow some compressed air through. Reinstall the idle mixture screws back to their original places and see how it runs. Checking the fuel filter, volume, and pressure is never a bad thing. If you have an aftermarket filter and you replace it carefully cut it open and visually inspect the inside. That can tell a lot about debris in the fuel system.


    Sent from my iPhone using Tapatalk
     
  3. Jul 5, 2012
    Mike C

    Mike C Member

    Austin, TX
    Joined:
    Feb 19, 2007
    Messages:
    743
    Fuel filter probably needs replacing so do that and I would put plugs in it. (I just rebuilt the carb on my boat because of bad plugs. Not time well spent...) Then follow all of Nikmils suggestions!
     
  4. Jul 5, 2012
    Bill F

    Bill F Finally running

    Hillsboro NH
    Joined:
    Sep 22, 2002
    Messages:
    588
    Carb was part of the issue. i took it apart and cleaned it. the idle is nice now. It looks like I need a fuel pump as well. I put on a clear fliter and it is not filling it up at all. I am going to pump a different pump on it Saturday.
     
  5. Jul 8, 2012
    Bill F

    Bill F Finally running

    Hillsboro NH
    Joined:
    Sep 22, 2002
    Messages:
    588
    It looks like I have everything fixed. From the looks of things it was many problems that all hit me at once

    1) it was overcharging, cooked a battery and a coil---fixed with new regulator
    2) Not wanting to start no spark---fixed with new coil, points, and condenser
    3) Would cut out while running, this one had me stumped for the longest time--fixed with new ignition switch
    4) Rough idle--fixed by cleaning carb
    5) Not getting enough fuel--Fixed by changing fuel pump and finding that the line inside of the tank was not sealing to the cover

    Also doing a little PM while I was working on everything else found a wheel bearing a little loose. Took it apart, repacked the bearings, put it back together and she is all set.

    Right now she is running as good as ever. No bullets where used this time around
     
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