False knock root cause on 0411 pcm

[greasess]

I just did a 4l80e swap on my 2001 suburban 1500/5.3 so i don't have to keep living in fear of the 60e losing the 34 clutch packs again. I full flashed to a 2002 os and did a segment swap. Im getting very slight knock in low load areas. Im not too concerned about the knock but i am wondering if the false knock problems with my 2001 pcm would be fixed with the 2002 os upgrade or is the problem hardware related. I also noticed that between 2001 and 2002 the 5.3 seems to have exactly the same engine but different spark and ve tables. I am getting far less knock with the stock 2002 tune than i ever did with the earlier os and tune with less timing. Seems like the 2002 os fixed it.

[nonnieselman]

On my 2000 i did a 2002 (12212156 OS) full flash and i never had any of the false knock show up after that. The 2000 was horrible. I even copied the 2000 Spark tables into the 2002 tune and didnt show any knock where it use to.

[greasess]

I would say the false knock problem is the software then...