71 c10 ls1 swap
Thread Starter
Teching In
Joined: Dec 2019
Posts: 7
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71 c10 ls1 swap completed ls1 swap, speartech wiring harness with reprogrammed computer by speartech. truck has new under dash harness, it's in Park, nothing happens when I turn the key, zilch, nada.
pretty sure ground wires are good, positive reading at starter, new starter.
no fuel pump start up either.
I'm electronically challenged, so if anyone has a few or bunch of ideas, I'd greatly appreciate it.
Thanks.
pretty sure ground wires are good, positive reading at starter, new starter.
no fuel pump start up either.
I'm electronically challenged, so if anyone has a few or bunch of ideas, I'd greatly appreciate it.
Thanks.
TECH Fanatic
Joined: Dec 2017
Posts: 1,468
Likes: 266
From: Bossier City, Louisiana
Do you have 12 volts at pin 16 on the OBD II port? What happens if you try to read codes with a code reader? This will tell us if you have battery power and ignition power to the powertrain control module.
Rick
Rick
TECH Fanatic
Joined: Dec 2017
Posts: 1,468
Likes: 266
From: Bossier City, Louisiana
If you have an Android phone, I'm a fan of the Bluetooth version of a device called "OBDLink MX+" but you will pay $70-ish for it. I like this one because it can read and write to your PCM (avoids HP Tuners and EFI Live programming costs) if you want to learn how to use "LS Droid" and "Tuner Pro RT". This also allows you to use any of the apps in the Play Store for streaming and logging parameter ID's while driving . . . without distracting you from concentrating on the road. But the Bluetooth device listed below also supports streaming and logging.
Without an Android phone, get any old code reader that is wired or Bluetooth. My fallback Bluetooth device is a 15 buck "Konnwei" OBD II reader from EBay and works great for simply reading and erasing codes. I rarely use my wired OBD II reader anymore.
Rick
Without an Android phone, get any old code reader that is wired or Bluetooth. My fallback Bluetooth device is a 15 buck "Konnwei" OBD II reader from EBay and works great for simply reading and erasing codes. I rarely use my wired OBD II reader anymore.
Rick
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completed ls1 swap, speartech wiring harness with reprogrammed computer by speartech. truck has new under dash harness, it's in Park, nothing happens when I turn the key, zilch, nada.
pretty sure ground wires are good, positive reading at starter, new starter.
no fuel pump start up either.
I'm electronically challenged, so if anyone has a few or bunch of ideas, I'd greatly appreciate it.
Thanks.
pretty sure ground wires are good, positive reading at starter, new starter.
no fuel pump start up either.
I'm electronically challenged, so if anyone has a few or bunch of ideas, I'd greatly appreciate it.
Thanks.
Since you are not getting fuel pump prime, you arent geting ignition power either. Is other things work in the truck, like headlights? Maybe you didnt tie in the power wire to the cab?
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Teching In
Joined: Mar 2023
Posts: 1
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From: Tennessee
lt4 swap in 72 chevelle 
so first time posting hear just moved to tenneesse and im starting a restoraton shop RMC ridgewood modern classics and its just me. im taking a 2016 camaro ss motor/trans/electrical and dash and insterment cluster and putting it in a 72 chevelle i am running into problems with service theft deterrent light. I have hp tuners and disabled the vats and did a wire intire to ecm pcm but it cranks fires up a sec and shuts off i tryed reprograming keys to it and nothing the door locks and remote work but its not starting. i ran a dtc test and i keep having no envirmental identifire receved from ebs and inflatable restrant modual would that be my problem for starting? but with vats disabled y is that causing the prob.