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Thread: Disabling fuel pump

  1. #11
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    If you run a pump dry for a prolonged period you can kill it.

  2. #12
    Daily Lurker rusty_nail's Avatar
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    Right, there you go. My LPG system is pretty ancient but I have a 3 way switch where everything is manually controlled, I don't have to and rarely do, use petty


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  3. #13
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    I thought it was actually a legal requirement when the LPG system is installed and the system is running on LPG the fuel pump had to be switched off.

    On the patrols this doesn't seem to be the case, they only seem to cut the power to the injectors.

  4. The Following User Says Thank You to Yendor For This Useful Post:

    patch697 (15th September 2012)

  5. #14
    Daily Lurker rusty_nail's Avatar
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    My system is ages old. Things may have changed since mine was done but my system runs through an impco vacuum pump and there is a manual switch on the dash. It's the second patrol I have owned with the same system.


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  6. #15
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    Quote Originally Posted by Yendor View Post
    I thought it was actually a legal requirement when the LPG system is installed and the system is running on LPG the fuel pump had to be switched off.

    On the patrols this doesn't seem to be the case, they only seem to cut the power to the injectors.
    I'm 99% sure in Vic its not a requirement mate.... Its by no means a hard one to sort out even with the ULP start systems but everything I've worked on for years has just had a relay on the injectors.
    Last edited by patch697; 15th September 2012 at 11:18 PM.

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    Yendor (15th September 2012)

  8. #16
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    Quote Originally Posted by patch697 View Post
    I'm 99% sure in Vic its not a requirement mate.... Its by no means a hard one to sort out even with the ULP start systems but everything I've worked on for years has just had a relay on the injectors.
    Yeah it just seems strange.

    You can be driving around running on LPG and if one of your petrol lines ruptures there is nothing that will stop the fuel from just pumping out.

  9. #17
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    Quote Originally Posted by Yendor View Post
    Yeah it just seems strange.

    You can be driving around running on LPG and if one of your petrol lines ruptures there is nothing that will stop the fuel from just pumping out.
    Agreed.... & considering how cheap & easy it would be to have it switchable I'm as surprised as you are that its not a standard requirement.

    Back in the day when I was racing, we used to run a pressure switch on the fuel line so if the pressure dropped it cut the ignition to save it from having a big lean out & destroying the engine & even that cost all of about $10

    Not something you'd need set up in this situation but not an expensive fix in any case considering the huge safety implications.
    Last edited by patch697; 15th September 2012 at 11:40 PM.

  10. #18
    Expert NewDan's Avatar
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    Hey Yendor, just wanted to let you know you were spot on, opened the cover in the back and found where they extended the wiring, it was just a matter of undoing the connector and now it runs on gas with no drips from the fuel tank, you saved my arse and something tells me you have the knowing of a lot of things. How do I become a forum sponsor and support this site with a few $$$. Dan

  11. #19
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    Quote Originally Posted by NewDan View Post
    Hey Yendor, just wanted to let you know you were spot on, opened the cover in the back and found where they extended the wiring, it was just a matter of undoing the connector and now it runs on gas with no drips from the fuel tank, you saved my arse and something tells me you have the knowing of a lot of things. How do I become a forum sponsor and support this site with a few $$$. Dan
    This link has all the info you need to become a forum sponsor

    http://www.nissanpatrol.com.au/forum...ewal-2012-2013

  12. #20
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    That's great news Dan.

    Hopefully the mechanic can fix the fuel leak for you (at no charge).

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