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Thread: Fuel Pump has no Power
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05-01-2019, 10:20 PM #1
Fuel Pump has no Power
07 LSV with the Indmar 325. Was running great and then wouldn't start. Starter runs fine but the fuel pump isn't running. Checked the safety lanyard, all the fuses and relays that I could find. Unplugged the fuel pump and checked for power at the connector and there is none with the key on. When you turn the key, the perfect pass comes on and you hear the beep and all the lights and ballast pumps work, but the fuel pump never runs.
I read through the similar thread from 5 years ago and tried everything in there, but still can't get power to the fuel pump.
Any help or ideas will be greatly appreciated.2007 LSV
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05-01-2019, 11:15 PM #2
Did you try the red breaker that's next to the ECU?
I just rewired my fuel pump harness, because I found that every so often I was getting a short and it wasn't priming on key start...2008 Moomba Mobius XLV. Monster Cargo Bimini, WS Rev 410's, Polk Cabins, 3 Infinity Subs, PPI amps, WS420, Exile BT, upgraded ballast pumps, up to 3,500+ pounds of ballast, Blue LED's...
1992 Supra Sunsport. **SOLD** 2k pounds ballast, Surf System, Blue LED's everywhere, decent audio system.
Tow Rig: 2013 F150 Ecoboost FX4 (wife's rig) Other money pits include:1998 BMW M3 Cabriolet, 2009 Audic A6 Avant 3.0T, 2005 Kawasaki ZX-6R 636.
www.TraysonsToybox.com
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05-01-2019, 11:50 PM #3
Happened to my mobius, it was the oil pressure switch. I wired around it and never got around to fixing it. If their is no oil pressure the fuel pump doesn’t run so you can’t run your engine dry of oil.
Sent from my iPhone using Tapatalk2005 XLV
gravity 3
perfect pass
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05-02-2019, 07:31 AM #4
Replace the oil pressure switch that the fuel pump gets the signal from.
Sent from my iPad using Tapatalk2017 Moomba Craz
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05-02-2019, 12:20 PM #5
OK... Where is this oil pressure switch? I did check the breaker by the ECU.
Also, where is the low pressure fuel pump located? I think I was only looking at the high pressure pump.2007 LSV
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05-02-2019, 12:54 PM #6
It’s in the valley between the heads and the back of the engine. You can trace the power wire back from the fuel pump to it.
Looks like this, although not necessarily on a T. If you find it you can jump the two wires and see if that kicks the fuel pump on with the ignition on.
https://forums.iboats.com/filedata/f...2&d=1400632031
Sent from my iPhone using Tapatalk2017 Moomba Craz
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05-02-2019, 07:09 PM #72008 Moomba Mobius XLV. Monster Cargo Bimini, WS Rev 410's, Polk Cabins, 3 Infinity Subs, PPI amps, WS420, Exile BT, upgraded ballast pumps, up to 3,500+ pounds of ballast, Blue LED's...
1992 Supra Sunsport. **SOLD** 2k pounds ballast, Surf System, Blue LED's everywhere, decent audio system.
Tow Rig: 2013 F150 Ecoboost FX4 (wife's rig) Other money pits include:1998 BMW M3 Cabriolet, 2009 Audic A6 Avant 3.0T, 2005 Kawasaki ZX-6R 636.
www.TraysonsToybox.com
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05-03-2019, 10:25 AM #8Senior Member
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2002 Moomba Mobius LSV - Sold
2006 Moomba Mobius LSV - Sold
2017 Moomba Craz - Enzos, Lead
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05-06-2019, 01:57 PM #9
Which pump is the one that you hear with that characteristic BUZZ as it primes on key ON?
Also, the wire harness for the fuel pumps has the positive and negative for both pumps coming from the exact same leads on the harness. So if the LP pump is getting voltage, the HP pump has to likewise be getting voltage.2008 Moomba Mobius XLV. Monster Cargo Bimini, WS Rev 410's, Polk Cabins, 3 Infinity Subs, PPI amps, WS420, Exile BT, upgraded ballast pumps, up to 3,500+ pounds of ballast, Blue LED's...
1992 Supra Sunsport. **SOLD** 2k pounds ballast, Surf System, Blue LED's everywhere, decent audio system.
Tow Rig: 2013 F150 Ecoboost FX4 (wife's rig) Other money pits include:1998 BMW M3 Cabriolet, 2009 Audic A6 Avant 3.0T, 2005 Kawasaki ZX-6R 636.
www.TraysonsToybox.com
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05-06-2019, 02:34 PM #10Senior Member
- Join Date
- Aug 2011
- Posts
- 2,522
The black one makes the buzzzz noise with the key turned on the first time.
The round one makes more of a clunk clunk and usually only runs when the key is in the start position and when the boat is running. Think these were added sometimes to help with vapor lock, how it's installed may be different.
I would trace the wires all the way till you get good ground and 12v with the key in the starting position. My guess there's a relay, when you first turn the boat to on the pump should prime, then run again once the boat is starting or running.Last edited by parrothd; 05-06-2019 at 02:36 PM.
http://www.instgram.com/jlyons30
2002 Moomba Mobius LSV - Sold
2006 Moomba Mobius LSV - Sold
2017 Moomba Craz - Enzos, Lead