Electronics Need help wiring something up? Thinking of adding an electrical component to your car? Need help troubleshooting that wiring glitch?

Fuel pump problems

Old Sep 22, 2002 | 01:47 PM
  #1  
Psyte's Avatar
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Joined: Jul 2001
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From: Surrey,BC,Canada
Car: 1989 Trans Am GTA
Engine: 5.7L 600cfm carb
Transmission: 700R4 (auto)
Fuel pump problems

i cant seem to get my fuel pump to work. i have an in-tank fuel pump with a return line. im in the process of a a TPI ->carb conversion and i think when i ripped the ecm out i may have cut the fuel pump wires. i tryed to apply positive battery voltage to the bottom left terminal on the ASDL and nothing happens. is my fuel pump toast? i cut every single wire that goes down into the passanger side pannel to the ecm. when i looked at the wires leading to the fuel pump, there is a purple, black and a grey wire going to it. does anyone here know what these wires do? im assumeing black means ground. what about purple and grey?
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Old Sep 22, 2002 | 10:01 PM
  #2  
RSpeed's Avatar
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Joined: Jul 2000
Posts: 992
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From: Tx
Car: 92 Z, 91 Formula, 04 CTS, 01 Tahoe
Engine: 355 forged 4 bolt, SuperRam, 58mm t
Transmission: T5, looking for t-56
One is for the fuel gauge and the other is power to the pump.If I remember correctly,the grey is power and the purple is for the gauge,but like I said,I am not 100% sure. When I switched to carb,I powered the fuel pump to ignition.
Also,you didn't cut all the wires at once did you?
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Old Sep 22, 2002 | 11:30 PM
  #3  
Psyte's Avatar
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Joined: Jul 2001
Posts: 401
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From: Surrey,BC,Canada
Car: 1989 Trans Am GTA
Engine: 5.7L 600cfm carb
Transmission: 700R4 (auto)
yes.....

yeah, i cut all the wires at once. i realize i should have eliminated them one at a time, but my engine compartment was completely covered with wires, they were getting in my way. i got pissed off at them always getting in my way and sliced off everything that was going to the ecm. i figured the ecm would be useless anyways so any wire going to it would be useless aswell
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