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Thread: low fuel pressure

  1. #1

    Default low fuel pressure

    My SIIA 2.25 petrol occasionally stalls from what I believe to be fuel starvation. I have replaced the fuel pump, carburetor, fuel filter and now I will put in a new fuel line from the fuel pump to the carburetor. However, I noticed that the clear fuel filter is not filling very fast at all. Just a trickle. I have had fuel starvation issues for months. What should I do next? Is there a way to measure the correct fuel flow?

  2. #2

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    If u call i can walk u thru a few tests for this issue. 360.866.2254 days

  3. #3
    Join Date
    Oct 2006
    Location
    North MS
    Posts
    981

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    Unfortunately, most of the aftermarket mechanical fuel pumps are junk. I have ended up replacing them on every Rover with a simple electric pump. However, the pump cannot be mounted in the engine bay, as it will get too hot (particularly in the summer) and can cause vapor lock (bucking).

    Something else to check, if you have your original fuel tank, is for rust in the lines and a clogged pick up tube in the tank itself.
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  4. #4
    Join Date
    Dec 2010
    Posts
    413

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    undoubtedly restricted fuel flow at/in the tank. back blow it with a air hose and see if you get a good flow at least for a few moments.

  5. #5

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    To everyone who responded to my vexing problem of "bucking" and surging; THANK YOU. The entire issue was indeed caused by fuel starvation, so upon pulling the draw tube from the tank it was discovered to be "home made" and partially clogged with hair, or fibers of sorts. I installed a new draw tube and the problem has vanished. I took it out and thrashed it hard today and it performed flawlessly.

  6. #6
    Join Date
    Sep 2010
    Location
    killingworth CT
    Posts
    836

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    Quote Originally Posted by Nigel70 View Post
    To everyone who responded to my vexing problem of "bucking" and surging; THANK YOU. The entire issue was indeed caused by fuel starvation, so upon pulling the draw tube from the tank it was discovered to be "home made" and partially clogged with hair, or fibers of sorts. I installed a new draw tube and the problem has vanished. I took it out and thrashed it hard today and it performed flawlessly.
    Good, check that periodically, and if you have a weber carb, there is a little filter accessed by a brass bolt that often gains sediment, especially if you are in dirt or sand with your truck.

  7. #7

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    Hello again, friends. Can someone tell me how to check for correct fuel pressure? We have 10% ethanol in our fuel here in CT so I wonder how long the diaphragm in the fuel pump should last? Upon a heavy lead it it starved for fuel.

  8. #8
    Join Date
    Dec 2010
    Posts
    413

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    if you have even 3 lbs. you'll be ok. i wouldn't want to run more than 5 or 6.
    u it really sounds like you have debris in the fuel tank. you can either remove it, fill it with road gravel and go vibrate it for a while ( harrow fields, put it in your cement mixer, etc. )
    OR: put a good inline filter in there and drive it for a couple years while keeping the tank full to avoid rusting.
    i do not think you have a serious issue, entirely curable !! keep us updated.
    btw, putting some oil or lead additive in your fuel will make your engine like you !!

  9. #9

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    FWIW, 3# is a bit high, and 55-6 # is what is specified for the Deisel engine. We've been selling an aftermarket mechanical fuel pump for 20+ years with ZERO comebacks. None. Zip. We also stock NOS Genuine Rover pumps as well.

    Dare Britannia, Ltd.

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