AEM E85 Fuel Pump - Tube keeps falling off...

Originally Posted by THE BULL

On another note.
How big is the pump?
Do you have a FP gague?
Did you drill the pump assembly?
Are you still returnless or is it a return style?

Usually E85 pumps are an upgrade and are higher flow, this is why the assembly needs to be drilled to relief some of this extra pressure it creates since the factory fuel pressure regulator located in the pump cannot control pressure since the added flow turns into added pressure since the injector duty cycle is low at idle. This is where a pressure gauge comes in handy, if this is the case you should see an increase in pressure at idle - the fix for this is to drill the relief a bit more.

A heavier duty hose and clamp will stop the tube in place but if you've not done what I posted in the top you'll have fueling issues in the future.
This is the downfall of the returnless system - any increase of flow will turn into pressure if not regulated.

Good luck!