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Location:
qld
Registered:
May 2003
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fuel pumps turning themselfs on
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Wed, 03 November 2004 13:37
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My fuel pumps are turned on when ingintion is turned on , through a realay,sometimes i will leave my car and one minute later the pump will turn on?
Is it just a buggerd relay, is a 30amp relay big enought for two fuel pumps (vl fuel pump and small pusher pump)
Jason
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: fuel pumps turning themselfs on
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Wed, 03 November 2004 22:00
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that depends on the quality of the relay.. a lot of the "30A horn relays" are not rated for 30A continuous..
it would be safer to plug in another relay anyway, and get a decent one (ie Bosch, potter&brumfield etc)
Cya, Stewart
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Registered:
November 2002
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: fuel pumps turning themselfs on
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Thu, 04 November 2004 01:35
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fwiw, i'm currently rewiring my entire car, and for most things, i will be earthing direct to the battery, thru a series of large earth cables... like the 25 and 60 amp cables (12/8gauge?) from Jaycar.
nothing i hate more than bad earths 
for relays, the VL commondores seem to have good quality ones. other than that i prefer to use 'proper' potter&brunfield ones, where the 40A rating is continuous, not 'horn' intermittent.. they cost between $5 and $10 each usually.
Cya, Stewart
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Registered:
November 2002
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Re: fuel pumps turning themselfs on
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Thu, 04 November 2004 02:03
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Damn funny you should say exactly this as I have an external fuel pump for my 1G-GZE in my RA23. It was earthed inside the cabin and then that failed. So I ran a twin thick earth cable from an old Corolla battery earth from the fuel pump to one of its chassis mounting bolts and also across to a bolt that runs into the chassis rail. Worked fine for 3 mins and then gradually the fuel pump slowed down to a complete stop. Now I have a dicky little 2mm wire running from the pump underneath the chassis all the way back to the battery - and of course - it works fine.......<sigh>....
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Location:
sydney
Registered:
March 2003
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Re: fuel pumps turning themselfs on
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Thu, 04 November 2004 03:12
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dont use relays from any holden
they are wired differently to your normal bosch relay
unless you know what you are doin
bosch relays and holders will set you back about 15 bucks for the set
goto your local auto elctrician and get them
most auto parts shops sell the cheaper relays
hella make ok relays too
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Location:
sydney
Registered:
March 2003
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: fuel pumps turning themselfs on
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Thu, 04 November 2004 05:14
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ahhh, gotcha, i didn't even think about it i just wired up by numbers 
ahh well, easy enough to push the pins from relay base if i ever need to change
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Location:
sydney
Registered:
March 2003
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), and it all seems to work normally...