garyr Posted September 14, 2014 Share Posted September 14, 2014 Came home from a run and put the bike in the garage. Fuel pump kept going on and off even though key was out of ignition. Opened fuel tank cap and it stopped (not a lot of fuel left in tank) any ideas!!! Link to comment Share on other sites More sharing options...
checksix Posted September 14, 2014 Share Posted September 14, 2014 Are you sure it was the fuel pump? Maybe it was the sound of air expanding/contracting in the (nearly empty) tank and going through the vent line? Link to comment Share on other sites More sharing options...
Member Contributer Switchblade Posted September 14, 2014 Member Contributer Share Posted September 14, 2014 Or was it the cooling fan . Link to comment Share on other sites More sharing options...
Shinigami Posted September 14, 2014 Share Posted September 14, 2014 Cooling fan won't run with key out. Link to comment Share on other sites More sharing options...
Member Contributer Rectaltronics Posted September 14, 2014 Member Contributer Share Posted September 14, 2014 I've heard similar sounds and believe it to be pressure equalizing. Instead of opening the cap, disconnect a battery lead. If you still hear the sound, it's not the pump or the fan. Link to comment Share on other sites More sharing options...
Shinigami Posted September 15, 2014 Share Posted September 15, 2014 Possibly related to the evap canister? Probably evap canister. It runs on a solenoid, so don't pull the leads until you compare the sound to this: http://m.youtube.com/watch?v=QjdC_biimdI Link to comment Share on other sites More sharing options...
garyr Posted September 17, 2014 Author Share Posted September 17, 2014 Well i just filled up with petrol, and the bike still makes a intermittent noise, open the tank and it stops, would it be the heat from the engine making the tank expand!!!. No evap canisters on UK bikes. Has anyone else noticed if there bike does this!!! Link to comment Share on other sites More sharing options...
Member Contributer Grum Posted November 20, 2014 Member Contributer Share Posted November 20, 2014 Had the same as garyr today. Came home from a ride, low fuel in tank and a warm day. Opened the garage to wheel the bike in (Ignition Switch was Off) and definitely heard the fuel pump prime then stop. It did this three times as I pushed the bike into the garage. Haven't notice this ever happening before and the bike has now done 8,500kms. I have a basic drawing of the PGM-FI system and there appears to be no way the Fuel Pump Relay can energize with Ignition to Off. Bit of a mystery, if anyone has the full service manual it may well be explained in Fuel System section 7. Cheers Grum. Link to comment Share on other sites More sharing options...
fatshoutybloke Posted November 20, 2014 Share Posted November 20, 2014 Yes, I noticed mine making gurgling noises after I'd turned it off when I first brought it home but it seems to have stopped doing it now. Weird. Link to comment Share on other sites More sharing options...
dogman Posted November 21, 2014 Share Posted November 21, 2014 Yes mine does it, its not the fuel pump and we have no evap canister, I think its the tank breather equalising the pressure. Thinking about it, when you park the bike and the engine is hot, the heat rises and heats up the tank and causes the pressure in the tank to increase and forces some vapour out through the breather, and there may be some restrictor or regulator in there making the noise. Thats my theory anyway, probably crap but it doesn't matter anyway... :) :) Link to comment Share on other sites More sharing options...
DriverDave Posted November 21, 2014 Share Posted November 21, 2014 Yes mine does it, its not the fuel pump and we have no evap canister, I think its the tank breather equalising the pressure. Thinking about it, when you park the bike and the engine is hot, the heat rises and heats up the tank and causes the pressure in the tank to increase and forces some vapour out through the breather, and there may be some restrictor or regulator in there making the noise. Thats my theory anyway, probably crap but it doesn't matter anyway... :) :) This is exactly what is happening. If you open the cap, it stops making noise, but after a few minutes it will start up again. It's all completely normal and everyone should stop worrying about it :smile2: Link to comment Share on other sites More sharing options...
Member Contributer Grum Posted November 22, 2014 Member Contributer Share Posted November 22, 2014 Certainly not worried about it DriverDave, we know its normal, its just a curiosity thing as my previous VFR's didn't do this. Dogman is probably onto something, the noise I heard certainly sounded like the fuel pump running, but some kind of pressure relief sounds like the answer. Cheers. Grum. Link to comment Share on other sites More sharing options...
Member Contributer Blesk Posted February 3, 2015 Member Contributer Share Posted February 3, 2015 I have no idea if this would be related. I've never noticed any noises once the bike is off, but I just had some warranty work done on mine: After a rain I noticed that there was water pooling under the filler cap. The drain hole wasn't draining. Upon investigation, the diagnosis was that the drain hose was routed incorrectly and once rerouted it now drains nicely. Hope this helps! Link to comment Share on other sites More sharing options...
dogman Posted February 3, 2015 Share Posted February 3, 2015 I have no idea if this would be related. I've never noticed any noises once the bike is off, but I just had some warranty work done on mine: After a rain I noticed that there was water pooling under the filler cap. The drain hole wasn't draining. Upon investigation, the diagnosis was that the drain hose was routed incorrectly and once rerouted it now drains nicely. Hope this helps! Yes its easy to forget to re-route the hoses if you take off the left side of the bellypan. Link to comment Share on other sites More sharing options...
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