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R33 Gtst S2 Has No Power At Fuel Pump!

chrisdicko23
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chrisdicko23 Community Regular

chrisdicko23

Posted
Posted

Hey guys in a bit of a pickle!

Was driving the other day and car just cut out on me and wouldnt start. I then looked under the hood and saw that i melted my o2 senssor wires onto the turbo manifold and that appeared to be the problem until i disconected it and tried starting with no o2 seonsor and got nothing. Next i took off the fuel lines into the engine and turned ignition on and found no petrol pumping or any sort of prime noise! So i took the fuel pump out and stuck it directly into the engine and ran it manually and the car started and reved up. So i assumed i had stuffed one of my relays to the fuel pump. To my understanding it is either both or one of the one behind the ecu in pass kick panel and in boot to the right of fuel pump fuse. They appeared to work fine after testing. Next i tried looking at the pump control unit and found no burns on the board but am not sure if there would be from 12 v? So not sure if thats working or not. Also i ear there is a ballist resistor connectin to the fuel pump in the boot which i have not yet looked at but am not sure what its duty is and if it can actually short circuit?

Need help! :)

Oh and also tried a mates ecu and nothing. So inconclusion there is no power on the wires on top of the fuel lid

boostn0199 Grand Master

boostn0199

Posted
Posted

To test if it has power you need to be holding the test light on the wire then get someone turn on the igntion and it should have power for a few sec. If that doesnt work take the next step and starting testing the power wire on the relay and also the triger wire on the relay and if thats all fine you should check if the relay is clcking.

  • 1 year later...
gotRICE? Veteran

gotRICE?

Posted
Posted (edited)

Its a pretty old post, but i did the same thing a while back on mine. Melted the 02 on the dump pipe.

It blew a fuse obviously and killed the whole car (travelling @ 100km/h down the freeway).

Changed the fuse and all was well. But over the next year, things started crapping out. I have a feeling the short melted something somewhere, and things werent getting adequate current. 1st the fuel pump (re wired onto the 4WS 12v), then my boost controller (re-wired off the AFM 12v.. using MAP so it was spare) and now, my Idle control isnt getting enough current. I am assuming all these things were feeding off the same circuit.

I asked about backfeeding the circuit, but it wasnt adviseable lol. So just took feeds from elsewhere.

So before going and ripping out the fuel pump, just throw a multimeter over it. I found that unless my walbro had EXACTLY 12v, it would not kick into life. The feed was only supplying a fraction over 11v. Same with the boost controller. Never knew they were that picky. heh

Edited by gotRICE?

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