RE: Fuel pump woes
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RE: Fuel pump woes - 6/29/2008 10:44:41 AM
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Butsky
Posts: 45
Joined: 4/16/2008
Status: offline
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Well, I am no expert, but it sounds to me that the pump is having a hard time building up the meagre pressure needed. It probably isn`t because the feed source (petcock, fuel filter) is poor, but the pump itself is on it`s way out. Just my take, but I could very wrong. be wrong.
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2000 CBR929 & CBR600F3 Smokin` Joes
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RE: Fuel pump woes - 6/29/2008 12:40:10 PM
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idodirt
Posts: 709
Joined: 8/14/2006
From: South Florida, USA
Status: offline
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quote:
ORIGINAL: SilverF3
SO if your turn the starter button to the on position an the fuel pump clicks alot what dos this mean? is it good or bad?
By the starter button, Im guessing that you"re talking about pressing the Starter button, not turning on the ignition with the key right ? Feeling a clicking or hearing a clicking sound is how it works. As I mentioned before, it receives electrical pulses, which in turn energizes the solinoid in the pump. A solinoid is a pull/release type of motion. When power is applied, it pulls. When power is removed, it releases. This pull/release motion generates the pumping action. Once it generates a little pressure, the clicking motion or sound drops to a few or a couple of clicks every couple of seconds. If yours is clicking all the time the engine is running and never stops, then I would suspect it is not generating enough pressure, which is not saying much. By there nature, these pumps don"t generate much pressure at all.
I did a little checking on the Fuel Cut Relay. It simply is a normal relay. When the Ignition Key switch is turned on, the relay energizes. It is always on unless the engine stop switch is turned off or naturally if the key is turned off. I took the relay out of its rubber mount while the enging was running. I tipped the relay in all different directions and the fuel pump continued to pump away. Many bikes these days do have a tilt relay to cut power to the fuel pump and ignition. Fuel injected engines need high pressure fuel lines to supply the injectors so they can spray fuel. Having high pressure fuel pumping after an accident along with a cut fuel line would be a serious hazzard. On fuel injected bikes, the fuel pump is an electric motor that provides the high pressure to the injectors.
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On the shore of Lake Okeechobee.
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RE: Fuel pump woes - 9/1/2008 10:22:24 PM
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jetmanjr
Posts: 3
Joined: 5/4/2008
Status: offline
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Seems I''m having similar problems. Went ahead and pulled the pump off, went gravity feed only for a good long ride. About every 10 minutes the bike sputtered out, but I was usually able to restart it while still coasting. Guess that was the fuel consumption beating out the available fuel flow and the bowls drying out. Popping the cap seemed to help a little, but it was all pretty arbitrary and freakin hot out, so who knows. Anyone have experience in taking one of these pumps apart and maybe trying to fix it? Sure seems like all the manuals are very lacking in this department, and $100 would be nice to avoid on a new one.
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RE: Fuel pump woes - 9/2/2008 7:37:23 PM
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kjohnson
Posts: 525
Joined: 7/31/2007
Status: offline
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You can bypass the fuel pump and go gravity feed only.The only setback of doing this is when you do high speed (trackdays,racing) long pulls in 5th or 6th gear the bike will shut off.But,you can get round that too by keeping the fuel tank 1/4 full.Normal street use and you probably won''t notice the difference.
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Street:F2-Fox Twin Clicker,Thermosman Forks,G'ridge lines,NGK Iridiums,Two Bros pipe,F3 rear wheel,Bridgestone 002 pro
Race:F2/3-EBC rotor kit,Ohlins shock,Thermosman front,KWS F3 engine,Bridgestone YCY slicks,HRC CDI,CFM rear sets,G'ridge kv lines
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RE: Fuel pump woes - 9/2/2008 11:54:09 PM
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shoemjay
Posts: 165
Joined: 10/13/2007
Status: offline
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i just had the same problem, it was always random, bike would run great some days and others like shit, and every once in a while it would cut off doing 70mph or what ever speed. Finially two weeks ago i was about 30 miles from the house at about 1:00am mourning going home after a fun friday,and BOOM cut out and was not starting,
So i took off the fairing and removed the fuel pump by hand no tools, and hooked the main petcock fuel line straight to the carb and it started right up and it got me home, when i replaced the fuel pump the bike ran smoother, i think the pump was slowly failing, it runs awesome now no problems at all and it stopped popping so much when i get off the trottle. only a 100$ fix
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