SimonM Posted August 6, 2021 Share Posted August 6, 2021 My Fuel pumps works when a live feed is connected to the fuel pump relay but when the ignition is switched on the fuel pump does not prime. Is the problem with the ECU or something else that controls the fuel pump? Link to comment Share on other sites More sharing options...
Captain 80s Posted August 6, 2021 Share Posted August 6, 2021 Could be the Fuel Cut Relay. It is up front next to the Headlight Relays and is the same part. You can swap as a quick test. Link to comment Share on other sites More sharing options...
SimonM Posted August 6, 2021 Author Share Posted August 6, 2021 I have swapped the relays round without success. Link to comment Share on other sites More sharing options...
Captain 80s Posted August 6, 2021 Share Posted August 6, 2021 Time for some 6th Gen experts to come along then. This is not uncommon tho. I think there's a power wire off of the ECU that has been troublesome for some. Good luck! Link to comment Share on other sites More sharing options...
Member Contributer Grum Posted August 6, 2021 Member Contributer Share Posted August 6, 2021 9 hours ago, SimonM said: My Fuel pumps works when a live feed is connected to the fuel pump relay but when the ignition is switched on the fuel pump does not prime. Is the problem with the ECU or something else that controls the fuel pump? Hi Simon. First, can you answer these questions. 1. When you press the starter button, does your engine crank over? And with good normal cranking speed? 2. Do you have a multimeter and know how to use it? 3. Do you have a wiring diagram of your bike? The full Service Manual can be downloaded from this forum. 4. With your Sidestand down and ignition to On, Kill Switch to Run. What is the Fi light doing? Does it flash any code? Does it come On for a couple of seconds then go out, or does it remain fully on? 5. You say your fuel pump works "when a live feed is connected to the relay" can you clarify this as the Fuel Cut Relay is controlled by the ECM supplying a Ground? Or did you just supply 12v to the Fuel Pump terminals to test its operation? Most Fuel Pump issues are not the ECM. Most common are Ground and Power problems. The top section of this diagram shows your Fuel Pump ops. Link to comment Share on other sites More sharing options...
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