10-19-2020, 09:21 AM
(10-19-2020, 08:36 AM)Lord Popgun_imp Wrote: Wow, I think this is the first complaint of a failed fuel pump on the board.
Did by chance you put 12v on the pump and see if it runs? By that I mean on the ground and 12v pins on the pump connector. For what they cost I’d be verifying everything!
Lord Popgun, I did not do that - but it might be an interesting experiment now that the gas tank is out- what I did is the procedure on page 5-52 of the manual [2013-2014 CB1100/A/SA] which states to turn on the ignition, turn the stop switch to run, confirm the pump operates for a few seconds (which it did not) - then it says if it doesn't operate - to perform a check on the fuel pump 4P connector to verify voltage between the two terminals - states there should be battery voltage for a few seconds- if there is battery voltage for more than a few seconds to replace the fuel pump- I had constant battery voltage on these pins- never went away - that was my 'oh-crap moment' then I spent a few hours researching and testing everything else (in the electronic circuitry) I could think of - all else checked good- although in retrospect I didn't check the angle position switch- anyway I don't fully understand why the voltage on that 4 pin connector (power / ground through the shutoff relay) should go away after a few seconds - or why the voltage remaining constant would indicate a bad pump - but the pump was not whirring, and the book test said it was bad- so hopefully it's the issue- if not it's gonna be an expensive lesson and the bike still won't run... that would be a double whammy! anyhow- maybe I will attempt hooking up battery power & ground to the FP now that the gas tank is out and I can access see / hear everything much better- I haven't removed the pump from the tank yet--- in retrospect your suggestion would have been the best test- but never having worked on fuel injection I was a bit skittish about experimenting LOL - but hey - I'm having fun now- I like troubleshooting as much as I like riding - it's just a different kind of fun is all :-)