s14 fuel pump issue????

[s13mike91]

okay, so i am in the process of swapping my ka-t out of my s13 into my 95' s14 chassis. before i was going to swap the motor in i was going to drain the gas tank by: having the ecu, relays, and all harnesses hooked up minus the engine being hooked up because its not in the car. so i got the battery hooked up, cut the ignition on and all of the dash lights and everything cut on properly except the fuel pump. so i go to check the fuse and its fine, so i started to think if it was the relay. i removed the relay and did this
http://i259.photobucket.com/albums/hh317/mikeg3347/2686__610x550_04-240sx-s14-fuel-relay-jump_0.jpg

as soon as i did this, my fuel pump cut on. does this mean my relay is bad, or im not getting signal from the computer or what????

[rcdad123]

the pump only goes on for a few seconds after you turn the ignition on. if the ecu does not see any rpm`s, it turns off the power to the pump.

[s13mike91]

the pump only goes on for a few seconds after you turn the ignition on. if the ecu does not see any rpm`s, it turns off the power to the pump.

Correct.. But the problem is the fuel pump doesnt cut on at all, when the ignition is cut on, as in not 1 second.

[gotta240]

So the pump should spray SOME fuel from the disconnected fuel line(disconnected from the fuel rail) when the ignition is first turned on....right?

[rcdad123]

then you might have to connect the distributor and MAF to the engine harness.

[Drifting-pedobear]

then you might have to connect the distributor and MAF to the engine harness.

wtf??


did you put your fuel lines on backwards?
the pump only primes for a second or two.

if you cross the relay, and it works, then the pump is fine.
check the wire with pink on it and see if its getting a reading (use a multimeter) thats the ecu, if not, then we trace back further.

[Southern Elegance]

Try swapping out the relay for one that works, if your problem still exist most likely its the signal.