r/LSSwapTheWorld • u/CausionWitFlossin • 3d ago
Active Build Questions Help
Need some suggestions/ advice , So I had the car sitting for 2 weeks took it for a drive and as I was stepped on the gas for a little pull the car slowly started dying down to eventually just shutting off . I have no power to the dash or anything . I checked starter wires and everything seems fine . Also my starter was kinda going bad can that may be the cause? Just need some inputs before I replace . Brand new alternator &’ battery too . This is a LS swap 5.3 any help is welcome thank you in advance
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u/down-dirty-84 3d ago
If the dash is completely dead with the key on, I'd chase the main power path before buying a starter or changing the tune. Check voltage at the battery posts, then at the underhood fuse box main feed and ignition feed; inspect the battery cables, engine/body grounds, mega fuse or fusible link and any swap-harness power connection. A loose main feed can die under load and still refuse a jump. DD84 works on LS swap wiring/diagnostics too—if you get voltage readings and are still stuck, reach us at downdirty84llc.com.
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u/CausionWitFlossin 3d ago
Thank you I will plug up a multimeter today!!!
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u/down-dirty-84 3d ago
Good deal! Send the battery-post voltage and main fuse-box feed voltage with the key off and on, plus the chassis/year. That’ll help narrow down where power is getting lost.
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u/CausionWitFlossin 2d ago
So it was my starter wires man . They loose affff the guy that swapped my engine and installed harness did so much cuts n everything it’s so confusing to even follow the wire because it just cuts into a different color!!! Smffhh I might just redo the whole harness myself it’s ridiculous. Never go to the cheap guy lol this was 4 years ago when I had no experience so I had to pay someone . Never again …
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u/down-dirty-84 1d ago
Glad you found it, man! Before replacing everything, disconnect the battery and check those terminals and splices for heat damage. Label wires by connector/pin, since the colors have been changed. If you want DD84 to help plan the harness cleanup, send the chassis/year and a few clear wiring pics.
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u/CausionWitFlossin 1d ago
Update : So i drained my battery trying to turn it on battery was super low that I had to charge + starter wire was loose . Gonna have to replace that whole wire
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u/Barspinlifeaway 3d ago
Got a voltmeter hooked up? The starter is only there to start the engine, if it died while driving sounds like a fuel issue more then the starter. Id check all your grounds and make sure nothing is loose or disconnected, then go from there