Siphon / Pump fuel from out of your FiST!

Discussion in 'Fiesta ST Maintenance' started by McRib 1s Back, Jul 28, 2014.

  1. McRib 1s Back

    McRib 1s Back Well-Known Member

    Fresh from my weekend at SoW, I was very disappointed that I could neither siphon the fuel from my tank or do the old shunt-the-fuel-pump-relay trick!

    First, like any modern car, there is an anti-siphon circuit in place. I tried various lengths and types of rubber and rigid polyethylene tubes without success. Getting the valve propped open wasn't an issue, but after feeding about 5' of tube into the car without getting fuel, it wasn't the way to go about this...

    Going directly to the fuel pump was the next step, and I could get pulses from the relay to allow fuel to flow. Unlike other cars, it just wasn't a steady stream. It just isn't a good way, either, unfortunately.

    I ran out of time before I could fashion something directly to the pump -- but that's next. It's not tough, but I wanted to share my experience here. Maybe it will save someone else some time.

    Oh yeah, I ended up running some old 91 octane fuel and the OTS Cobb map instead of my new 100 octane Mountune "race rally" map. I have never run anything other than 93 octane maps (on 100 octane fuel) for track events, and it really changed the car. It was a real bummer since this was easily the hottest day I've ever run the car (ambient was about 102F). It just wasn't my day. Next time...
    Last edited: Jul 28, 2014
  2. Register or Sign in

    Advertisement Sponsor

  3. JustinP

    JustinP Member

    Out of curiosity, did you try the special funnel and a smaller hose? Or just your standard fuel siphon hose with no special funnel.
  4. JustinP

    JustinP Member

    Just re-read that. I see now you did get the two anti siphon flaps open. Never mind.
  5. McRib 1s Back

    McRib 1s Back Well-Known Member

    You might still be on to something here -- I have a collection of funnels, but want to try one more later tonight. Frankly, I ran out of time.

    While I think I had it open enough, I'm willing to try once more with my even longer skinny funnel (that I bought for re-fueling my NC700 bike).

    Otherwise, it's time to run leads from my jumper battery box, directly to the pump.
  6. razorlab

    razorlab Active Member

    The way I do it on the Evos is to just take the return line off the return hardline and the car pumps the fuel right into my jugs while its idling. :)

Share This Page