Fuel pump not priming
Discussion
I took out the fuel pump of the gas tank to test it- I removed the gas tank, took off the fuel filter. disconnected the fuel injector hose to the fuel pump.
I wanted to do something like this video: https://www.youtube.com/watch?v=ZFuSvNtbVBM
then reconnected the fuel pump to the motorbike so that I see if I could hear the whirring hum sound you hear for a few seconds when you turn on the ignition. No sound. Power was reaching the pump I used a multimeter to check- there would be a spike in voltage for a few seconds when ignition turned.
I then thought maybe it's because the fuel injector hose (still connected to fuel injector hose which itself is also plugged into engine) is not connected to the fuel pump- that must be why it can't prime....Nope. nothing.
There is no way there can be anything wrong with this pump- the bike was running like clockwork before I decided it strip it and test it...
Must it be in the gas tank with the gas tank having some fuel in it, in order to hear that humming sound at the start? If that's the case I'm really confused by that video...
I wanted to do something like this video: https://www.youtube.com/watch?v=ZFuSvNtbVBM
then reconnected the fuel pump to the motorbike so that I see if I could hear the whirring hum sound you hear for a few seconds when you turn on the ignition. No sound. Power was reaching the pump I used a multimeter to check- there would be a spike in voltage for a few seconds when ignition turned.
I then thought maybe it's because the fuel injector hose (still connected to fuel injector hose which itself is also plugged into engine) is not connected to the fuel pump- that must be why it can't prime....Nope. nothing.
There is no way there can be anything wrong with this pump- the bike was running like clockwork before I decided it strip it and test it...
Must it be in the gas tank with the gas tank having some fuel in it, in order to hear that humming sound at the start? If that's the case I'm really confused by that video...
Ilovecbrs599999 said:
the bike was running like clockwork before I decided it strip it and test it...
It was running fine. You fiddled with something you don't understand. Now it's broken. Hence the saying: if it ain't broke, don't fix it.
Sure you have got the polarity right at the pump?
PS the guy in that YouTube video is an idiot. Don't copy them. The pump is designed to run in fuel, not air. Also be aware that spraying petrol around can be extremely dangerous, especially when you add the potential for sparks from makeshift wiring, and even more so if you were silly enough to do this anywhere near your fuel tank.
Edited by GreenV8S on Saturday 23 September 10:42
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