just after rebuilding my98 sti and fitted the engine
dont know what happened but sumthing seemed 2 short
out now i cant get the fuel pump working, have checked all
fuses and relays (i think) any 1 got any ideas what might b wrong
Could i have fried my ecu. totally baffled

 

Have you checked under the rear seat?

There's a connector on the driver's side of the car what can melt and short out. Either that, or the pump may have given up.

 

is that the conectors at the pump? if so they seem 2 be fine also the pump is only 2 months old and worked fine when i took the engine out going 2 test it 2nite. when looking at the ecu i noticed that a earth wire that is conected 2 the bottom bolt was melted striped it back and no other wires have been damaged. do u think that the power surge that happened will have damaged the ecu?

 

you have to take off the bottom part of the rear seat to see this connector i had the same problem,the connector had shorted out and melted so renewed the wires in the connector and all was fine its not the one on the pump itself,,hope that helps.

 

engine earth?

 

have tried all plugs arround the pump and done a power test and there is no power at the pump. tried another ecu and still no joy. have all the interior removed and checking the loom. found 1 earth wire melted at the ecu. but everything else seems ok.

 

Immobiliser???

 

try the big green fuse in the fb by passenger side susp turret, theres 2 its the 1 nearest the turret

 

TRIED ALL THE FUSES AND DONT SEEM 2 FIND A BLOWN FUSE AT ALL WHERE DOES THE FUEL PUMP RELAY HIDE?

 

have you done this? you say you have checked the fuel pump connectors but you need to check this to. you wont have any continuity if this is melted i.e power to pump. hth

 

The fuel pump relay is behind the dash board on the drivers side, its sits at the bottom of the "A" post (windscreen pillar) you will find a small bracket with 2x can relays in it. the relay you want has 2x yellow wires, a light green/black wire & a black/red wire.

Thick Yellow = 12v Ignition Feed for fuel pump
Thin Yellow = 12v Ignition Feed for relay
Thin Light Green/Black Stripe - ECU applies an earth to this wire to trigger relay
Thick Black/Red Stripe = Supplies 12v to fuel pump when relay is triggered

Phil

 

great going 2 go and try to find the relay in the morning hope it will sort the problem out, any more possibilits of what the fault may be would b much appricieted as i want 2 try and get the car down 2 the paint shop on sunday.

 

help any more suggestions still baffled

 

where you located?

 

have you tryed this yet,cause thats what mine was ,,

 

could sum1 help me still in dire need of sum advice. think ive found the relay i was looking 4 (round metal cased relay) swaped it 4 the 1 beside it but still the same no power 2 the fuel pump. is there and other main fuses or relays hiding in there?

 

Does the relay click when you turn the ignition on?
Is there power on the switch side of the relay?
Have you checked continuity of the wiring from the pump back to the relay?

 

yea checked the power with a tester. going 2 have 2 get a auto spark down.
if i take anymore off the car its gonna b a bare shell soon. have i got the correct relay the metal cased 4 pin relay?

 

What color wires has the relay got?

Have any of the wires got 12v on them with the ign on?