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No Signal To Fuel Pump

r32gtst001100

By r32gtst001100,
in General Maintenance

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r32gtst001100 Enthusiast

r32gtst001100

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Posted

Hi

R34 GTT isnt getting a signal to the fuel pump

have tested the fuel pump with a direct 12V source and it works

when car is switched to ON, the pump doesn't prime

does anybody know possible reasons for this?

is there a stock fuel pump relay, if so where it it located?

thanks for the help

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r32gtst001100 Enthusiast

r32gtst001100

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had a similar prob with a sr s13 turned out to be the bolt that holds the ecu plug in was not done up

ecu plug is deffinitly on tight

i tried to get some diagnostic codes using the diagnostic plug, but couldnt get the engine light on the dash to flash

im leaning towards a faulty ecu

gonna try get hold of a spare r34 neo gtt ecu to test it, or put my ecu in another r34 (if anybody can help me that would be great)

cheers

domo88 Rookie

domo88

Posted
Posted

surely there should be a relay in the fuse box under the bonnet in r34 test if there is power getting to the relay if there is its prob the relay if not, its something pre relay ecu/wiring/earth maybe if you wanna check if the ecu fuel pump output is working get a wiring diagrame and check the wire on the plug for ecu?

gotRICE? Veteran

gotRICE?

Posted
Posted

I just had this issue with my R33.

Hard wire it to another 12v source. I used the 4ws lol. Seeing as im not using it.

In my case it appears the circuit is dodgy. As my boost controller stopped working too.

Fuel Pump, boost controller (wired to stock solenoid wiring) and stock narrowband were all only getting 11v. Not enough to make them work.

I just re wired them all to different sources (bar the narrowband as its not in use) and all is fine again.

Leave the earths as the are.

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