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

Fuel Pump Wiring Problem?

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Old Mar 18, 2011 | 07:49 PM
  #51  
firdbird1987's Avatar
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Joined: Mar 2011
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the wire harness is missing something

i have a 1988 v6 firebird supposivly the fuel pump went.... i have started with the under the hood things first.....
my fuel relay harness is missing a clip and a wire from what i am seeing is there any possability that the missing clips in the harness could be my problem? Two of my relays are like this...
when i first got the car it had a fuel shut off
when my aunt had it she had it removed.
now the car will not start, nor do i hear the fuel pump.
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Old Mar 19, 2011 | 10:21 PM
  #52  
Yungcris09's Avatar
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Joined: Feb 2011
Posts: 65
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From: memphis tn
Car: 89 camaro irocz convertble
Engine: 5.0 ho v8
Transmission: 700r4
Re: Fuel Pump Wiring Problem?

Yea my security light **** on wen I turn the key but it goes off after a couple of seconds its crazy but what can make it not get power to the fuel pump and not mak my fuel injectors work
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Old Mar 30, 2011 | 09:58 AM
  #53  
Johnnygeek's Avatar
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Joined: Mar 2011
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From: Daytona Beach
Car: 1988 Formula
Engine: L98
Transmission: TH-700-R4
Axle/Gears: BW 9 bolt 2.77
Re: Fuel Pump Wiring Problem?

Check:
Fuse for Orange Wire(under hood near battery)
Fuse for Fuel pump(under dash near brake pedal)
Check all the fuses

If good then carefully and temporarily bypass fuel pump relay (relay provides power to MAF and ECM)
listen for sound of pump (may need helper to listen at filler neck)
no pump sound is a dead pump or short in wires to pump
If pump works:
your Electronic Control Module is not sending voltage to turn on the relay.
Check:
Ignition control Module (under distributor cap) or the
Oil Pressure sending unit (near bottom of distributor attached to block)
not sending voltage to ECM
verify all Grounds are good
just a quick compiled list I'm not a pro
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