minty

iTrader: (1)

Hi guys, i hope someone can shed some light on an issue for me please.....

My Classic 99 impreza is not starting and its Fuel....

Fuel pressure gauge is reading zero after the fuel filter.
It's a Walbro Fuel pump.

Took the hoses off the filter and noting is coming through.
i can blow through the pipe from front to back...so pipes are clear.

the fuel pump relay(i believe, drivers footwell) is clicking when the ignition is on.

The wiring inside the fuel pump (red wire) gets 12v when the ignition is turned on briefly.

When connected up the fuel pump does nothing.

When i run an earth & 12v (behind a 15a fuse) to the fuel pump conector the pump works fine.

So........

the wiring gets the 12v to the pump connector.
the fuel lines are clear & unblocked
the pump works when connected to a battery.


is there another control circuit that will primpe the pump at ignition ????????

everything seems to be fine, but it doesnt seem to work when it all gets put back together............heeeeeelp please it's frustrating

Cheers
Chris.

360ste

iTrader: (1)

Have you checked the earth connection? As it could be a bad earth.

4wheel

iTrader: (2)

can be the earth under the back seat quite a common fault on the classics i believe hope this helps

minty

iTrader: (1)

Thanks guys... after all of that it was the connector under the back seat !!!
It could have been two bolts and the seat out instead of pretty much the entire fuel system stripped down !!!

thanks for all your help, i'm a happy badger now the car starts

thanks again.

KAS35RSTI

iTrader: (73)

Happened to me on my previous impreza. Guess it was all the heavy people sitting in the back

dee052

iTrader: (1)

I've had this twice on my car and once on a friends car, to get the pump working again, I took it out, put it to the battery terminals, spun the pump forwards and backwards and put it back in again. After it happened the second time I added an extra earth from the pump to the body and it hasn't happened since.

mbd sti2

iTrader: (2)

mine did this last year but i cut and soldered the wires together as the contacts didnt look great never been a problem since

minty

iTrader: (1)

can you get a spray/grease that's for ensuring electrical connections, like a white wax type stuff, i'm sure i've seen something like this before ???

markjmd

iTrader: (11)

It's usually just known as 'white grease'. The only real difference compared with most other grease is the colour and the fact it won't degrade plastics or rubber.