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 Post subject: Fuel pump faulty !!!
 Post Posted: Mon Nov 28, 2016 5:33 pm 
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Johnny English

Joined: Thu Jul 06, 2006 2:34 pm
Posts: 1382
Location: Somerset
I think the bloody fuel pump is on its way out , on several occasions now I turn key , all dash lights come on , HISS light goes out ,fuel relay clicks , yet no priming of the fuel pump and she wont start :Bang

Anyone had this happen to them ?

Looks like the fuel pump is sealed unit , Honda price £500 !!! 8o 8o ,, weemoto pattern part £150, Ebay £100 ( MandP)
Anyone got a spare 900 fuel pump :angel :angel

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 Post subject: Re: Fuel pump faulty !!!
 Post Posted: Mon Nov 28, 2016 6:38 pm 
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John Travolta (Are you Dancin'?)

Joined: Mon Aug 21, 2006 7:42 pm
Posts: 1873
Try the plug with two wires under the fuel tank. I might have a spare pump in my box of spares. Will look a bit later.

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 Post subject: Re: Fuel pump faulty !!!
 Post Posted: Mon Nov 28, 2016 7:37 pm 
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Johnny English

Joined: Thu Jul 06, 2006 2:34 pm
Posts: 1382
Location: Somerset
Thanks Daryl, as always your a star mate :clap :clap

UPDATE !

I just came in from the garage, after some more researching on the web , and turned my attention to the fuel pump relay,

Bare in mind battery is new and is giving 12.8 v ,

So I just been out with my meter and ran a wire from the prime pump live feed wire to my meter +ve probe and the other probe to earth


I turned key and the reading was barely 11v, and fluctuating down to 10v, im thinking this is not enough volts to prime the 12v pump correctly.

I then located the fuel pump relay, under the seat, and I notice there is x3 relays all the exact same spec, so I swapped one over with the suspected faulty fuel pump relay

Turned key and BOOM , the fuel pump immediately springs into life with a really lively whirring sound , not usually heard :angel
Voltage reading 12v constant.

So im hoping that's it , I hope the circuit I swapped with is not so crucially dependant on the unwell relay, as I commute everyday , and will order a new relay asap


So fingers crossed I just need a new 12v NO RC-2208 MITSUBA relay

This relay is from Honda is 8o 8o 8o



PFKL561816

RELAY COMP., STARTER (MITSUBA)


£37.60

or £2.29 from ebay for a 30a 12v No relay, and abit of soldering of wires !!

http://www.ebay.co.uk/itm/12V-Relay-5-PIN-Automotive-30AMP-30a-Changeover-RY7-Detachable-Bracket-/111581021341?hash=item19fabf449d:g:wOYAAOSwDNdV6WVm

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 Post subject: Re: Fuel pump faulty !!!
 Post Posted: Mon Nov 28, 2016 8:09 pm 
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John Travolta (Are you Dancin'?)

Joined: Mon Aug 21, 2006 7:42 pm
Posts: 1873
Nice cheap fix is always good :clap
If you do get stuck for a fuel pump I do have a spare.

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 Post subject: Re: Fuel pump faulty !!!
 Post Posted: Mon Nov 28, 2016 9:45 pm 
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Needs to get out more!
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Joined: Mon Jul 13, 2015 8:08 am
Posts: 1096
Location: In The Garage
For an electrical problem you diagnosed and sorted that out nice and quick - I'm impressed. :clap


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 Post subject: Re: Fuel pump faulty !!!
 Post Posted: Mon Nov 28, 2016 10:19 pm 
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Johnny English

Joined: Thu Jul 06, 2006 2:34 pm
Posts: 1382
Location: Somerset
woodyeee wrote:
Nice cheap fix is always good :clap
If you do get stuck for a fuel pump I do have a spare.


thanks daryl :thumbup

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 Post subject: Re: Fuel pump faulty !!!
 Post Posted: Mon Nov 28, 2016 10:21 pm 
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Johnny English

Joined: Thu Jul 06, 2006 2:34 pm
Posts: 1382
Location: Somerset
HOON98 wrote:
For an electrical problem you diagnosed and sorted that out nice and quick - I'm impressed. :clap


thanks Hoon, although I should admit , I am a qualified sparky and I started life as an electrical control panel systems engineer :angel

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 Post subject: Re: Fuel pump faulty !!!
 Post Posted: Tue Nov 29, 2016 12:52 am 
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Needs to get out more!
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Joined: Mon Jul 13, 2015 8:08 am
Posts: 1096
Location: In The Garage
Lol! - so that explains it! :angel - I was starting to feel really inadequate and thinking 'blimey - how did he work that out?' :eek :D


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 Post subject: Re: Fuel pump faulty !!!
 Post Posted: Tue Nov 29, 2016 10:32 am 
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Johnny English

Joined: Thu Jul 06, 2006 2:34 pm
Posts: 1382
Location: Somerset
:lol :lol

I just managed to find a 30a N/O relay in my garage , wired it up to the fuel prime circuit , turned on the ignition and it works great,
Result !!!

keep your £40 relay Mr Honda :finger

:angel

ps anyone reading this in the future who may need the wiring diagram , please let me know

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 Post subject: Re: Fuel pump faulty !!!
 Post Posted: Fri Feb 03, 2017 11:01 pm 
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Johnny English

Joined: Thu Jul 06, 2006 2:34 pm
Posts: 1382
Location: Somerset
Argh, its back !!! :Bang

Leaving work today , turned ignition on , nothing , silence, after 10 attempts the fuel pump finally energised and started immediately , then , later on getting fuel the same again, sat on the bike trying to start it , with car drivers queuing behind :help

So guess what my weekend job is , :cry

Ive done some web hunting on this , and I get a few hits come back of -


Fuel pump
Fuel pump relay
ECM
Clutch switch
Side stand switch
Kill switch
Bad earth

What I have discovered so far,
Apparently the last 6 items above all rely on a good earth also to put a " GOOD TO GO" signal to the ECM , which in turn energises the fuel pump relay,,,

The bike has never cut out while riding, if it did , it wouldn't be ridden.

I hope its not the end of my 9er , shes on 30k miles now , and the engine is as sweet as a nut.

Any others ideas on this one is greatly appreciated :thumbup

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 Post subject: Re: Fuel pump faulty !!!
 Post Posted: Fri Feb 03, 2017 11:30 pm 
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John Travolta (Are you Dancin'?)

Joined: Mon Aug 21, 2006 7:42 pm
Posts: 1873
Connector under the fuel tank that goes to the fuel pump?

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 Post subject: Re: Fuel pump faulty !!!
 Post Posted: Sat Feb 04, 2017 10:10 am 
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Johnny English

Joined: Thu Jul 06, 2006 2:34 pm
Posts: 1382
Location: Somerset
woodyeee wrote:
Connector under the fuel tank that goes to the fuel pump?


I checked that thanks mate, and the ground connection there, seems all good, its in a pretty protected area too, so no water or salt getting in there.

A few FI fireblades with the same issue if you google it also :Bang

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 Post subject: Re: Fuel pump faulty !!!
 Post Posted: Sat Feb 04, 2017 12:45 pm 
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John Travolta (Are you Dancin'?)

Joined: Mon Aug 21, 2006 7:42 pm
Posts: 1873
It's easy to pull the pump out of the bottom of the fuel tank if you want to look at that. No need to buy any gaskets for it if you do as I've had mine out a few times without issue.

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 Post subject: Re: Fuel pump faulty !!!
 Post Posted: Sat Feb 04, 2017 7:58 pm 
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Johnny English

Joined: Thu Jul 06, 2006 2:34 pm
Posts: 1382
Location: Somerset
woodyeee wrote:
It's easy to pull the pump out of the bottom of the fuel tank if you want to look at that. No need to buy any gaskets for it if you do as I've had mine out a few times without issue.


:thumbup


Today I removed the kill switch and stripped it down, it had old hard lube in it , removed it all and re-greased with light oil.

I have also removed the side stand switch connecter and shorted it out, to prove if the switch isn't making giving an intermittent contact.

Fuel pump is now priming , but its done this before , been ok for a few days then goes again.

The neutral switch is also involved in a " good to go " signal to the ECM, that in turns primes the pump, so will check this out also.

I will try and keep this going until I find a solution , as it may help someone else in the future if they get the same issue :)


below is a 900 ignition system diagram for those really interested :angel

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 Post subject: Re: Fuel pump faulty !!!
 Post Posted: Sun Feb 05, 2017 1:22 pm 
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Johnny English

Joined: Thu Jul 06, 2006 2:34 pm
Posts: 1382
Location: Somerset
Update,

This am turned ignition and no fuel pump prime noise :Bang

I then checked the side stand switch circuit , and its good !! glad about that as its £65 for a new, 8o


I then turned to the " engine stop relay" which when energised, the fuel pump relay immediately energises after,

so I swapped the engine stop relay with my home made temp car relay just to see, and the fuel pump primed immediately, 8o

I have tested 20 times so far and the fuel pump primes immediately every time , have I found the issue ? did the fuel pump relay and the engine stop relay both have issues , they are identical relays ? do they have a life span ? abit like bulbs , when one goes the rest also go around the same time ?

Anyway , I will keep an eye on it all.

:)

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 Post subject: Re: Fuel pump faulty !!!
 Post Posted: Fri Nov 24, 2017 7:25 pm 
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John Travolta (Are you Dancin'?)

Joined: Mon Aug 21, 2006 7:42 pm
Posts: 1873
.........................You have a pm Paul :D

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 Post subject: Re: Fuel pump faulty !!!
 Post Posted: Sat Nov 25, 2017 10:42 am 
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Johnny English

Joined: Thu Jul 06, 2006 2:34 pm
Posts: 1382
Location: Somerset
woodyeee wrote:
.........................You have a pm Paul :D


thanks Daryl :thumbup

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