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LS2 throttle body on LS1 Vette p1516 REP problem

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Old 02-22-2018, 12:20 AM
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bbuddine
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Default LS2 throttle body on LS1 Vette p1516 REP problem
Hey guys,

I have a 2002 C5 base with a Dorman LS6 90mm intake manifold. I purchased a LS2 throttle body along with the LS2-LS1 throttle body adapter from Caspers. I'm throwing the Reduced Engine Power p1515 p1516 code and I was wondering, do I have the wrong throttle body? It is a LS2 TB but it has a GOLD throttle body blade. Do I have the wrong blade color? Do I need a SILVER throttle body blade?

Let me know what you guys think!

Thanks!

-Brian
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Old 02-22-2018, 02:35 AM
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RedRiderZR1
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Yes, you need the silver blade LS2 throttle body. The gold one will cause nothing but problems just like you are having. Will need some tuning also after making the swap.
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Old 02-22-2018, 05:15 AM
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Originally Posted by RedRiderZR1
Yes, you need the silver blade LS2 throttle body. The gold one will cause nothing but problems just like you are having. Will need some tuning also after making the swap.

I Don’t get it though. Look here’s a picture of my TB
My throttle body blade opens upwards which is what he silver blade does too. That’s the only reason for the silver blade. The only thing different is the color which idk how that would magically make everything work. So what gives?
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Old 02-22-2018, 05:17 AM
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Originally Posted by RedRiderZR1
Yes, you need the silver blade LS2 throttle body. The gold one will cause nothing but problems just like you are having. Will need some tuning also after making the swap.

also so I already have a full dyno tune and he said it’s either throttle body or Casper’s wire harness
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Old 02-24-2018, 11:32 AM
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Cuz13
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What is the part# on the throttle body
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Old 02-24-2018, 01:43 PM
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bbuddine
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Originally Posted by Cuz13
What is the part# on the throttle body

The part number for my gold blade ls2 TB is 12605109

if this is the wrong throttle body for sure, what is the correct part number I need?
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Old 02-24-2018, 01:58 PM
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Cuz13
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Originally Posted by bbuddine



The part number for my gold blade ls2 TB is 12605109

if this is the wrong throttle body for sure, what is the correct part number I need?
You have an LS3 throttle body the LS2 number is 12570790. I have seen results from re-pinning the LS3 body that looked promising.
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Old 02-24-2018, 01:59 PM
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Originally Posted by Cuz13
You have an LS3 throttle body the LS2 number is 12570790. I have seen results from re-pinning the LS3 body that looked promising.

What do do you mean by repinning? Like rewiring? If so where? Do you have a thread?
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Old 02-24-2018, 02:01 PM
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Not sure where the thread is located but it is in this forum. Search LS3 throttle body
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Old 02-25-2018, 08:51 AM
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Originally Posted by Cuz13
You have an LS3 throttle body the LS2 number is 12570790. I have seen results from re-pinning the LS3 body that looked promising.
This may be the thread you're thinking of. I don't recall but don't think it was entirely conclusive.
https://www.corvetteforum.com/forums...y-on-a-c5.html
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Old 02-25-2018, 02:15 PM
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It would be great if those LS3 TB's worked on C5's because they're cheaper and easier to find. Oh well. At least the LS2 is easily swappable.
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