Vapor Lock? Troubleshooting

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  • Loudermilk136
    Junior Member
    • Jun 2015
    • 2

    #1

    Vapor Lock? Troubleshooting

    Needing assistance identifying what could possibly be vapor lock. My Gm 604 has been running like the carb is sick, sputtering at random times and going away and running great at times. So I bought a brand new hendren carb(CHP Fuel btw)...same problem. Swapped fuel pumps...same problem, Running CV fuel log and regulator and having around 8psi of pressure. I have noticed when I've tried to set the fuel pressure it doesn't change when I play with the regulator... I'm not running a return line. I've heard it could help prevent vapor lock though. What are some signs of vapor lock? Thanks
    Last edited by Loudermilk136; 06-09-2015, 12:19 AM.
  • brad hibbard
    Senior Member
    • Oct 2007
    • 974

    #2
    we always recommend a return style regulator when running CHP-- because CHP has such a low boil point it is very likely to have vapor lock

    i noticed you said the regulator does not react to adjustment
    you also said that you are NOT running a return line

    it sounds like you have a return style regulator and they must have a return line

    if it is a dead head style regulator it must be between the pump and carb ----also could be plumbed wrong

    send a picture of your set up to 330-540-7223 and we will try and help

    Brad

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    • Dirtmod13
      Senior Member
      • Jan 2014
      • 245

      #3
      Brad, do you have the contact info for stealth carbs? I can't find it on the Internet

      Comment

      • brad hibbard
        Senior Member
        • Oct 2007
        • 974

        #4
        phone # is 423-339-2272

        he attends to his email much more than the phone so also try
        stealthracing@att.net

        if you don't have any luck let me know
        brad

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