Electric Fuel Pump Help!

[chester_fb]

hey everyone

 

I'm installing a facet electric fuel pump into the boot of my rolla,

 

i've hooked up the fuel line to this line ( pic below)

 

i've wired everything up, but it still isnt drawing any fuel through the pump, the pump is brand new so its not the pump that is f@$ked

 

have i conected it up to the correct line on the tank?

 

or is there any other reasons why it is not picking up fuel

 

cheers all

chester

 

 

[chrisandliz[RL]]

does the fuel pump need to primed?

[chester_fb]

nope, its self priming, and i just tested it by picking up fuel out of a jerry can,

 

must be something with the fuel tank line

[Falken_KE30]

Is the pump external or internal?

 

Have you wired it up to a relay?

 

Ive just put one in me KE30, its a external pump, i have a hose going from tank to pump, then pump to fuel lines obviously.

then i have a earth wire in boot, and a power wire going to a relay near battery. so when i turn key to "on" the relay picks up from the coil that the car is on and the pump starts.

 

Also, have you blocked off the mechanical pump on the block? i Pressume its in a KE70.. so a 4k?

[chester_fb]

its an external pump, the facet kind that most people use,

 

the relay is all wired up, it just connected from tank to pump to a bottle at the moment so i can see if its pumping fuel or not

its earthed in the boot etc. and the mechanical fuel pump has been blocked off, and its a ke70 with a 4k.

 

it sucks fine out of a jerry can, but it wont suck out of the petrol tank.... wierd

[Falken_KE30]

yeah, check you have pump the right way... sounds stupid but i did it lol...

Facet pump.. yeap, mines a 2.5 to 4 psi.

 

try hooking it all how its supposed to be, put a bit of fuel in carby and start car. maybe it needs a bit of vacuum presure to start pumping? just an idea..

[chester_fb]

yeah its all hooked up the right way :) i made sure i checked that,

 

it was all hooked up the way it was supposed to and still no luck :D

 

I'm out of ideas

[Taz_Rx]

Double check the pump flow as Dan said, also check the wiring polarity.

I know this sounds really simple, but you might be blowing bubbles in your tank!!!!

The pump actually works yeah!? just nothing happens?

 

I know you said its self priming, but have you tried manually priming it first!?

[Falken_KE30]

yeah same, does it pull fuel from a can of fuel or something while its hooked in car. and does the car idle while it hooked like that?

if it does, id say pull the top off the tank and clean the pickup area.. maybe its clogged.

 

Also try putting a bit more fuel in tank..?

[chester_fb]

the fuel pump is fine, its pulling fuel out of a can exactly how its setup now, straight out of the boot, it just seems to be having trouble pulling the fuel out through the metal tube, what is the easiest way of taking the top of the fuel tank off?

[Falken_KE30]

not too sure on best way.. never removed one before. but from looking at mine there is a ring around the top with some tabs on it. i think you turn that left intill it comes off?

[chester_fb]

ok this may sound stupid, but what if i make my own hole and just run a piece of fuel line into the tank?

[Falken_KE30]

dodgey... wont work i don't think.

 

Ive seen inside a tank before, not a corolla one, but it has a filter and other stuff in, breather hoses and crap.

Try hooking it all up and put a bit of fuel in carby. and see if it idles..... the vacuum pressure maybe "unclog" the lines.. dunno

[chester_fb]

ok reconnected up the mechanical fuel pump again, and still no luck :) was running fine before installed the electric pump and no its not pumping any fuel with either setup....

[Falken_KE30]

did you take out the electric pump?