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Anyone care to take a look at this log? Knock retard is pulling out a consistent 3.88* (spikes & falls down, spikes & falls down) of timing under WOT 1st and 2nd, fades out and doesn't do it anymore...

That sounds about right.

I got a 98 L31 vortec. Stock PCM, when I read PCM w/ the tune tool the VIN doesn't show up, just shows N/A in the VIN line. When I check the PCM info w/ the tune tool it shows up, what gives? ...

just depends on how rich you go, w/ more fuel you can add a bit of timing. I usually have anywhere from 1-3 degrees added in from the fuel mixture spark correction table. I watch the log for knock...

I don't have too much of a problem w/ knock. Sometimes there is a 5 deg. retard, seems to be random and usually just when coming out of WOT, so it could be something to do w/ burst knock. Other...

thanks for the replies so far. Forgot to mention that the truck is a 2wd w/ the 4.8L, but you prob caught that from the tun file. I'll try more of a stock curve on the pressure and add some TM back...

Wondering if anyone could help me out.

After deleting all the TM on an 04 GMC the 1-2 shift is slower than stock @ WOT, firmer but slower. It drags through the shift, then sorta bumps into...

anyone know if the crank relearn bidi tool will work on this vehicle? got a buddy that needs this done.

thanks

yes, the performance column is settings for when in tow/haul