Originally Posted by
E55Amg
I don't have the log/tune files with me at the moment, but wanted to solicit thoughts. I'm VE tuning a 96 L31 I put in my 99 S10 ZR2 right now. I followed the generic instructions for tune setup, and have a few drives logged. It feels quite powerful at low and mid throttle, but goes very weak on the top end. Looking at the logs, the NB O2s show extremely lean at the exact moment of transition to the PE mode (I have set to enable at 65% throttle w/no delay). As soon as I let off the throttle to get below the enable, the O2s come right back into the switching zone.
I have considered air leaks upstream of the O2s, but they seem to switch fine just below that point, as well as at mid and low-throttle driving. Also wondered what kind of output the stock V6 fuel pump has, but I keep going back to the fact that it occurs EXACTLY at the PE switch point at varying RPM (it will do it at low RPM if I go heavy throttle).
Will post tune/logs later this evening if anyone is interested.
Jon