It could be the diaphram inside the FPR, but there are a couple other places I'd check first: #1 the Fuel Cut Relay #2 the handlebar mounted kill switch. If the PO used the bar kill often (bad move), it may need to be carefully taken apart and cleaned. Good luck and please keep us informed... especially after you get it fixed :deal:
929RR FUEL PUMP CONTINUOUSLY PRIMING!
Hello everyone,
My name is Vladimir and yesterday I bought my first Fireblade :clap::thumb:, 2001 CBR929RR with 22k miles, pretty clean except for a dent in the gas tank and some minor scratches. Here is the issue: when I turn it on there is a click and the fuel pump starts priming however it doesn't stop running after couple of seconds but continues to run after the priming is finished! As the pump continues to run I hit the start button and the engine starts and idles fine. Also a red light flashes on the dash display. I asked the previous owner about this and he says he never bothered to look into it because the bike always ran fine. Now my question is: which component in the system tells the pump to stop priming (until the engine is turned on)? Is it the fuel pressure regulator, fuel stop relay or something else? :idunno: Any help would be very much appreciated....:rotfl:Thank you
My name is Vladimir and yesterday I bought my first Fireblade :clap::thumb:, 2001 CBR929RR with 22k miles, pretty clean except for a dent in the gas tank and some minor scratches. Here is the issue: when I turn it on there is a click and the fuel pump starts priming however it doesn't stop running after couple of seconds but continues to run after the priming is finished! As the pump continues to run I hit the start button and the engine starts and idles fine. Also a red light flashes on the dash display. I asked the previous owner about this and he says he never bothered to look into it because the bike always ran fine. Now my question is: which component in the system tells the pump to stop priming (until the engine is turned on)? Is it the fuel pressure regulator, fuel stop relay or something else? :idunno: Any help would be very much appreciated....:rotfl:Thank you
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The thing that controls the priming signal is the ECU.
I had the exact same issue when I bought my CBR929.
Turns out my ECU was broken and so the previous owner connected the fuel pump so it was always on.
Best thing to do is get the wiring diagram off this forum (http://www.fireblades.org/forums/honda-fireblade/86073-929-954-wiring-diagrams.html)
Thing to check is the fuel cut off relay. The headlight relay behind the screen is the same relay so you can unplug that and try that
The ecu controls the relay to tell it to prime/supply fuel or not.
If you cut the power to the fuel pump the bike will die. So I guessed it needs to run anyway.
I'm sure the brown wire that goes back to the ecu should ground/earth so that the 12v on the black cable (also connected to the fuel injectors) can complete its circuit. That way it then allows the relay to turn of and supply fuel.
Let us know how you get on
I had the exact same issue when I bought my CBR929.
Turns out my ECU was broken and so the previous owner connected the fuel pump so it was always on.
Best thing to do is get the wiring diagram off this forum (http://www.fireblades.org/forums/honda-fireblade/86073-929-954-wiring-diagrams.html)
Thing to check is the fuel cut off relay. The headlight relay behind the screen is the same relay so you can unplug that and try that
The ecu controls the relay to tell it to prime/supply fuel or not.
If you cut the power to the fuel pump the bike will die. So I guessed it needs to run anyway.
I'm sure the brown wire that goes back to the ecu should ground/earth so that the 12v on the black cable (also connected to the fuel injectors) can complete its circuit. That way it then allows the relay to turn of and supply fuel.
Let us know how you get on
I couldn't stand it . I went over to my buds house and robbed his ECU this evening. Swapped it and ruled it out. Even with another working ECU it still just keeps priming along. I guess my next step is getting a fuel pump. I feel like i have ruled out everything but that. I really can't see that it would be the issue because the way I see it ....the fuel pump works or it does not. Something has to be dropping off the voltage to it seconds after key is on. BUT WHAT IS IT!....:crying:
Thoughts anyone???
. I went over to my buds house and robbed his ECU this evening. Swapped it and ruled it out. Even with another working ECU it still just keeps priming along. I guess my next step is getting a fuel pump. I feel like i have ruled out everything but that. I really can't see that it would be the issue because the way I see it ....the fuel pump works or it does not. Something has to be dropping off the voltage to it seconds after key is on. BUT WHAT IS IT!....:crying:Thoughts anyone???
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