Results 1 to 4 of 4

Thread: Fuel Loss

  1. #1

    Default Fuel Loss

    Hi guys. I have a fuel issue where if the car sits for a week or so, it won't start until I pour fuel into the carb with a bottle. There are no visiable leaks externally. If a fuel pump was bad could it cause the fuel to drain out? Once it finally starts, it'll run all day without an issue until it sits for another week or so. Thanks for any help, Chris.

  2. #2


    What carburetor is it? Could remove the carb and set the level a couple inches over a piece of cardboard primed with 50% mix of Marvel Mystery Oil available at auto parts stores it is red and oil less likely to evaporate. Spray outside clean with starting fluid. After it's dry, start checking for leak. Fuel pump should have nothing to do with it. Don't do this indoors.

  3. #3


    A bad mechanical fuel pump can drain the carb. I learned this the hard way.

  4. #4
    Join Date
    Jan 2010
    Brisbane, Australia


    @Stuck: What carburetor do you have? A partly blown Holley power valve will allow the bowl to drain and slowly evaporate. Hard starting is then a symptom.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
About us
Holley has been the undisputed leader in fuel systems for over 100 years. Holley carburetors have powered every NASCAR® Sprint® Cup team and nearly every NHRA® Pro–Stock champion for four decades. Now, Holley EFI is dominating the performance world as well as our products for GM's LS engine. Holley's products also include performance fuel pumps, intake manifolds & engine dress–up products for street performance, race and marine applications. As a single solution, or partnered with products from other Holley companies - Hooker Headers, Flowtech Headers, NOS Nitrous, Weiand, Earl's Performance Plumbing, or Diablosport - Holley products can give you the edge you need over the competition.
Join us