2010 LS3 6.2L starts stumbling for 10 sec then dies.
This has been a trip!
New harness, ecm, NB o2's plugs Has Innovate WB O2's also.
Had several codes but all cleared but P0315, 0204, 0621.
Can't do crank relearn on the new ecm because it will not run more than 10 sec stumbling.
Put the old ecm back in and get same codes except NO P0315.
One week ago (orig ecm) had it running like a beast. Parked then the next day went to start it...runs stumbling for 10 sec n dies. So bought a new ecm.
I don't have a clue where to look next!
Here's my tune and the last log I made when running good (orig ecm). It's only a little over 12 min but I'll post it.
Hope someone has an idea
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