89 Fuel Pump Running Too Much????

[SpecOps13]

My 89 Again.... Neverending Terror Stories...


If i were to let the bike set for any length of time, I'd expect the fuel level to drop in the carbs and the fuel pump would run for 5 seconds at "Key On". Then, I'd expect the pump to run at start up until the carbs filled up. If I shut the bike off and turned the key right back on, I'd think the carbs would be full and the pump would skip the initial 5 second run. It would only kick on when additional fuel was needed.:bang head::bang head::bang head::bang head::bang head:

There are times that the fuel pump will run for 5 seconds, then I turn the key off and back on, over and over and over the fuel pump runs. Today, I pulled the air box and watched the carbs for overflow while I did this dozens of times, nothing overflowed. I've had the pump apart and everything was in place. There are times that the pump acts just like the one on the 94 and at"Key On" I'll get a click, click. Carbs are full and pressure is up.

Note, this has occurred with 2 different sets of carbs on it, multiple relays, several gauge pods, new lines, new filter and so on..... Even cleaned the tank vent....
WTF IS GOING ON ???? :ummm::confused2:

 

[maleko89]

Make sure hose clamps are tight. Same thing happened on my '89 twice. First, needed to set the rubber diaphragms in fuel pump. Second time the end cap of fuel filter was loose so was sucking air. Next time it does it, remove fuel line from carbs and aim into container. If fuel is coming out each time you turn the key then it's not an air leak.

 

[SpecOps13]

Thanx for the thoughts Mark...:biglaugh:

I just went out to the garage. The bike's been sitting for 6 or more hours so it's cold. It clicked 3 times when I turned the key on and no clicks with additional switch flips...

I have double clamps on all hoses. No leaks there. I did that about a month ago. Filter is new. Vent is clear.

The bike seems to do this most often when it's up to operating temperature while adjusting the carbs..:ummm::confused2::ummm: When I shut it down to take a break or smoke or whatever.