Ls3 swap, limp mode! Help!

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Aug 30, 2020 | 11:42 PM

Jet242009

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Ls3 swap, limp mode! Help!

Hey all, my ls3 swapped 2000 ws6 is throwing one code P1276, and upon startup I have no pedal (drive by wire) after deleting the code with a scanner the pedal comes back, but the car has a major cut in power. I’m not very familiar with these swaps so I’m just trying to learn what I can and hopefully fix it. I’m thinking it’s possibly the tps, but I’m honestly guessing.

thanks for your help!

Aug 31, 2020 | 07:00 PM

B52bombardier1

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From: Bossier City, Louisiana

Did this throttle pedal and TAC module come with this engine from the donor vehicle?

Rick

Aug 31, 2020 | 07:07 PM

Jet242009

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No, ls3 is out of a 2015 camaro, tac/throttle pedal are out of a pontiac G8. I also noted two more codes on startup today, P1516 and P2101. Ive checked all of my wiring and found no issues with loose connections/plugs and none of the wires have any bare spots,kinks, or breaks.

Aug 31, 2020 | 07:21 PM

B52bombardier1

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From: Bossier City, Louisiana

I'm no expert but there are incompatibilities between pedals, TAC modules, wiring harnesses, PCM's and operating systems within PCM's. I hate to make predictions, especially about the future (I'm borrowing this quote from a famous dead guy) but I'd bet you have a problem here with compatibilities.

Rick

Aug 31, 2020 | 07:26 PM

Jet242009

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Im really hoping not, car was tuned/dyno'd with these parts by the previous owner. It just recently started having problems...sooooo im hopeful...going to be taking to a speed shop this weekend and with any luck they can help narrow it down. Honestly though, i feel like it would be less of a pain to just convert it back to drive by cable. Are there any real bonuses to keeping it drive by wire?

Sep 7, 2020 | 05:04 PM

G Atsma

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Gen IV ECM's will not support DBC.

Oct 2, 2020 | 04:34 AM

Jet242009

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Quote:

Originally Posted by G Atsma

Gen IV ECM's will not support DBC.

are you sure? There’s a ton of people claiming to have done it and adapters for sale....regardless, figured out what was going on! Torque management was tuned out and speedo was wayyyyy off!