Jump to content
SAU Community
  • Welcome to SAU Community

    Welcome to SAU Community, like most online communities you must register to view or post in our community, but don't worry this is a simple free process that requires minimal information for you to signup. Be apart of SAU Community by signing in or creating an account.

    • Start new topics and reply to others
    • Subscribe to topics and forums to get email updates
    • Get your own profile page, build reputation and make new friends
    • Send personal messages to other members.
    • See fewer ads!

    Consider joining our newsletter for the latest content updates

    Click here to register

Fuel Pump Problem - Weird Priming Noises On Cold Start, Fine Once Warmed Up?


Recommended Posts

Hey all,

Have a small problem regarding the Bosch 040 pump since installed. On a cold start when I turn the key to reds/ignition the pump makes weird noises when priming. Instead of the usual buzzing/whirring it makes weird knock like noises, reminds me of my friends description of indigestion noises. It sounds like it works, stops, works, stops, works stop giving off a knocking noise.

The noise however doesn't occur anymore after you've driven the car for abit i.e after its actually warmed up. Once the car is warmed up it'd make a normal priming noise of a constant buzzing for a few seconds then just stop.

Any ideas of what this could be? I'm hoping direct feeding a 13.8v power source to the pump will solve this issue.

Oh and when I installed the pump I warpped the pump in a rubber layer so it wouldn't make any noises, could this potentially be causing the problem or another problem?



Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Create New...