LTX and LSX Putting LT1s, LS1s, and their variants into Third Gens is becoming more popular. This board is for those who are doing and have done the swaps so they can discuss all of their technical aspects including repairs, swap info, and performance upgrades.

LT1 wiring assistance needed please...

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Old Aug 20, 2013 | 09:27 PM
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Ninety-One's Avatar
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From: Santa Clarita, CA
Car: 91 LT1 RS 89 IROC-Z 350 TPI
Engine: LT1 // 350 TPI
Transmission: WC T5 // 700R4
Axle/Gears: BW 9 Bolt 3.27 //BW 9 Bolt 2.77
LT1 wiring assistance needed please...

In the process of wiring my LT1, no fuel pump, and no crank. I read awhile back i need to modify the starter relay, by grounding a wire on the relay? anyone familiar? I cant seem to find that info again, And what all has to splice into the c207 under the dash to get the car running? BTW: i have the ALDL spliced in and mounted under the hood already from the blue connector) I know for sure the check engine light, and also i need to bypass the vats, but i dont know what resistor i need, nor do i have access to the car or the bcm for this engine, just the ecm and harness. I have the underhood fuse box wired into my fans, and fuel injectors (via plug c100 on lt1 harness) most everything else is stripped out, and i do have power at the box and to the rest of the car and fuses and lights and stuff work. Currently i have nothing hooked up at c207 and the pinouts don't speak my same language apparently, lol. also, i am using the 3rd gen fuel pump relay, its all hooked up to the pump and LT1 harness, but where does the red wire go on the relay? maybe that's a dumb question? is there something i need to eliminate to get the pump to run? i have followed pockets threads on stripping the 3rd gen harness and i had also stripped out pretty much everything but fans, ac, and the injector wiring from the underhood LT1 harness and hooked up the batt/keyed hot/grounds. any help appreciated, i know there not that many people doing the lt swaps with the new ls stuff but im on a budget...
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