Q's about fuel tank

[Jimbo2000]

gday over the last few weeks i've noticed a little rust buildup in the fuel filler area which i am pretty sure wasnt there before

i've also been hearing a little buzz now and again which i'd like to ask about as i fear it might be the pump on its way out

it only lasts a split second and sounds a little like pop of static coming out of the speakers but it happens whan the radios off so i'm guessing its the pump as thats back there too and guessing that might have something to do with the rust

and lastly is that screw supposed to be there holding the flap open, i dont think it is but i never removed it after taking it off the past owner as i dont know why it was put there and what might happen if removed

thanks

[Jimbo2000]

anyone?

[Remix-]

Get some rust kill onto it.

[Jimbo2000]

cool

could it be the pump?

[auzdark]

could be the pump dealing with the fume pressure in your tank... are you running closer to empty?

when you open your fuel cap, do you hear it go pssssssssssssssshhhhhhhhh?

the same thing happens with my exa, but i dont have the rust problem though id say try and get rid of that asap!

[Jimbo2000]

thanks

i know theres a lot of knowledgable peeps on here, stop being shy

[Jimbo2000]

bump

[Jimbo2000]

ok getting worried now, only made 305ks off the last tank of ultimate, usually make 400 same driving style

i need to speak to a fuel management pro in sydney, any contacts guys?