Conversions & Swaps LSX Engines in Non-LSX Vehicles
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Old Aug 17, 2006 | 07:50 PM
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Ok, I have a problem. I wired up everything and I just went to hook up the positive battery terminal and as soon as I touched the wire to the terminal I heard the fuel pump kick on and start to run. I checked the key and it was in the off position. Any ideas on what could be wrong?


Some additional info: I'm using the fuseblock from a 2000 trans am for my fuses and fan and fuel pump relays. I already checked the fuel pump relay and all the wires are hooked up where they are supposed to be. I'm using the original post on that fuse block for my direct battery connection for all my relays. Also, it isn't just my fuel pump that turns on. I have three relays that I use to power up my engine sensors, injectors, etc, and I can hear them clicking on everytime I touch the positive wire to the battery terminal. Those 3 relays also have the direct voltage terminal of the relay connected to that post on the fuse block.

Last edited by x-pauliber; Aug 17, 2006 at 10:30 PM.
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Old Aug 17, 2006 | 08:28 PM
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How is your relay wired?
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Old Aug 17, 2006 | 10:32 PM
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I have terminal 86 on all my relays hooked to ground, and terminal 30 hooked to direct battery voltage. If I switched these two, would it make a difference?
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Old Aug 17, 2006 | 10:50 PM
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No, don`t switch the two. What about terminal 85 on the relays what is that wired to?
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Old Aug 17, 2006 | 10:58 PM
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Fuel Pump Relay:
Terminal 85 to pin D of connector C101
Terminal 86 To ground
Terminal 30 Direct to battery voltage
Terminal 87 to 1 20A fuse then to the fuel pump



Terminal 85 of the Ignition Relays are hooked to a lead that is hot in run and start modes, but they activate when I hook up the positive battery lead.
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Old Aug 18, 2006 | 09:57 AM
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From: S. Philly
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There is a big PNK wire go to the fuse block that will require ignition feed from your own car. Where did you hook that wire to? You need to check this big PNK wire. It soulds like you have hooked this big PNK wire to a constant 12V source. Therefore when you hook up the battery it acts as if you turn on the key to the run position. Good luck
Vinh.
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Old Aug 18, 2006 | 10:03 AM
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Yeah you have to have the big pink wire for the IGN relay hooked up to switched 12v source. The source has to have 12v when the key is on AND during cranking.

Is your fuel pump constantly running??? Or does it prime then shut off..??

Justin
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Old Aug 18, 2006 | 10:21 AM
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theres pin 87 and pin 87a... you may have them swapped.. if thats the case, then its always on, except when the ECM turns it on.....then it shuts off. lol.
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Old Aug 18, 2006 | 05:47 PM
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From: S. Philly
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He is using the whole fuse box. The thick PNK wire will feed all the ignition #1 circuit in the fuse box. Also there is only one output (wire) coming out of the fuse box that feed the pump which is pin 87. I believe there is only 4 prongs for the fuel pump relay so there is no 87A.
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Old Aug 18, 2006 | 07:26 PM
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LS1cobra is right! I figured it out. I attached constant power to the post on the fuse block and it powered up a whole row of fuses, which caused a whole bunch of problems. I took the fuses apart and cut them into individuals, put it back together, and it fired right up! UNBELIEVEABLE!!!! I can't thank all of you guys enough that helped me get this thing running! Exhaust early next week and I'm on the road! Thanks again!
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