Fuel Pump Power


hi people,

hoping somebody can help me out before Monday. I replaced the fuel pump in my 99 busa as the old one was faulty. Since swapping out the pump it doesn't prime when the ignition is on. I've done a direct jump on the battery and pump runs. I've swapped with another ecu still no go. The relay has been checked and seems to be ok it clicks twice with the ignition on and the a final click off after a few seconds. I've check all the wireing and seems to be no lose connectors. The error code is c41 so I'm stuck as I've read thread after thread and I can't get to the bottom of mine.

hoping someone will be able to help.



Would your old one prime but just didn't have pressure, or was it doing the same thing?


Have you tried checking the power at the pump plug (bike side) when you turn on the key. With the pump unplugged?


seems to be no power through the harness. Took the harness that goes from pump and injectors off and seem to have a power issue with the harness that leads to the ecu. Any idea what this harness is officially called?

also how can it still power the relay I'm puzzled


can anybody point me in the direction to the fuel pump relay fuse. According to alot of posts these can blow and I'd like to check it but can't seem to find the fuse on my bike.

many thanks


Nice avatar btw

I think there is a fuse marked 'fuel' in the main fuse box at the front of the bike under the left half shroud.


so turns out a blown fuse. Got some new ones and the busa is all happy again. Now to hope it doesn't blow again otherwise I gotta work out why it's blowing.

thanks everyone for your help your all amazing and this forum is fantastic.


the old one would cut in and out. When riding it would stutter
In what way? I've read a lot of people having similar problems to mine that dies occasionally when going slow in traffic and also lack power above 7-8000 rpm, but no one can pinpoint the problem.
Your bike runs perfectly now after fuel pump swap?
Thread starter Similar threads Forum Replies Date
J No power to fuel pump General Bike Related Topics 16
C Fuel pump no power Busa problems 4
W No neutral light, no fuel pump prime, no power to power commander General Bike Related Topics 15
Dr Pain Powering a 2000 fuel pump from an out side power source. Maintenance and Do-It-Yourself 4
50Bait No power to fuel pump Busa problems 10
M Fuel pump not priming Busa problems 24
T Gen1 fuel pump. Wanted 18
3WheelerMod Fuel pump not cycling.... Busa problems 5
Kevin Jones My favorite fuel pump grommet, 15114-35F00 Busa problems 0
I i need an intank fuel pump!! General Bike Related Topics 11
M 2000 hayabusa fuel pump Busa problems 5
F Fuel pump not pumping Busa problems 9
G 2001 busa fuel pump General Bike Related Topics 2
Scooby315 Fuel Pump Painted Busa problems 9
K Wanting to buy 99busa but owner said needs fuel pump. Parts and Modifications 36
c10 Gen 2 Fuel pump sock replacement video . Gen II Busa Information 14
E 99 hayabusa - What is the part number for the gasket that connects the fuel pump assembly together? General Bike Related Topics 3
Sandow Top Fuel Dragster Fuel Pump Demo single cylinder Off Topic 11
J Start button does nothing fuel pump not priming General Bike Related Topics 37
SmokeKingOfCali99Hayabusa Gen 2 hayabusa Fuel Pump General Bike Related Topics 3
Z Fuel pump Busa problems 20
T Fuel pump wont work when brakes are applied General Bike Related Topics 3
T Inline fuel pump routing Busa problems 3
Blackmax Fuel Pump wires General Bike Related Topics 9
Blackmax Fuel Pump wires General Bike Related Topics 1
Swiftfalcon Fuel Pump upgrade Gen 2 General Bike Related Topics 3
B Changed fuel pump and assembly with brand new one, however C41 error code still shows. Bike runs ok. Do I still have a problem. Busa problems 4
Native Busa Help with Fuel Pump or Wiring Harness Busa problems 3
B 1999 Busa fuel pump.Hi I am looking for the best replacement 1999 hayabusa external fuel pump and filters and strainers kit with the o rings, General Bike Related Topics 17
fallenarch Gen2 Fuel Pump Maintenance and Do-It-Yourself 7
derivera AEM high flow fuel pump (in tank replacement) Gen II Busa Information 7
Vetteman761 Fuel pump electrical connector Electrical Mods 7
voodoodoo 2013 Hayabusa fuel pump no fuel filter Busa problems 7
202mphbusa 600+ HP fuel pump Turbo 28
himanshu23 Hayabusa Fuel Pump whining noise................................ General Bike Related Topics 4
ky busa Fuel pump? General Bike Related Topics 14
ky busa Fuel pump (here we go again) General Bike Related Topics 1
LCash Electrical issue mimics fuel pump problem Busa problems 1
night_ryder Replacing stock fuel pump Maintenance and Do-It-Yourself 4
instigator1225 External Fuel pump Questions General Bike Related Topics 13
loneraider fuel pump issue Busa problems 1
Narcissus Fuel Pressure Regulator and Pump Testing Busa problems 2
Valingt AEM 50-1000 fuel pump Busa problems 4
Mikesbaron Is this rubber thingy supposed to be here (external fuel pump near injector) Engine and Performance mods 10
D External Fuel Pump Replacement General Bike Related Topics 5
C Stock Fuel Pump Relocation? Gen 1 All Motor 3
highestgrade Fuel Pump, Float Etc. Tank Internals Rust Out..need Replacement! Gen II Busa Information 0
Cireous Fuel Pump Connector Busa Mods 9
C Fuel Pump Relocation Pix-external Busa Mods 11
A 2005 Busa Fuel Pump Wiring General Bike Related Topics 1
Similar threads

Latest Bikes

  • Bam Bam
    My Last Little Girl
    • rlmoorex
    • Updated:
  • My first Busa - 2012
    Nice, clean and well looked after , my pride
    • Kimbo2570
    • Updated:
  • busa
    nice and clean again first ride since ecu reflash
    • bigjimbo
    • Updated:
  • A blue bike
    2017 blue & black
    • Hayabusa Wannabe
    • Updated:
  • 2011 busa
    2011 limited edition candy sonoma red busa
    • Hetheus
    • Updated:

Forum statistics

Latest member