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Fuel pump won't stop running
Just popping in
2015/3/19 13:39
From alma
Registered Users - Ultimate
Posts: 1
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89 MAX fuel pump runs fine when the bike is cold.No flooding or overflow from the carbs,checked the vent valve(or spill valve),cleaned the tank,changed hoses & fuel filter & tried 2 different fuel pumps.It isn't the diaphragms in the pump. I get the same results 3 times in a row. Switch on,fuel pump clicks once or twice & vboost cycles.Fire her up & fuel pump cycles once every 5 seconds or so.No problems till about 15 minutes later after she is at normal operating temp.Then the fuel pump clicking starts to increase. Instead of 1 click every 5 seconds it jumps to 2 or 3 every 5 seconds till after about 17 minutes,then the fuel pump is running non stop. Shut her off & wait an hour.Then everything is fine but again 15 minutes later the whole process starts over again.I disconnected the low fuel sending unit but no change,checked the pump voltage & that is fine,checked the ground & voltage at the fuel pump relay & that is fine.
I am not sure how to check the relay itself. First problem in 6 years of daily riding. Any ideas?

Posted on: 2015/3/20 14:41

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