Originally Posted by Rhino79

02-05 trailblazers and envoys don't use a MAF, 06 and newer do. I have an 05 Trailblazer 4x4 with 3.42's and with a tune only I went from 16.1 to 15.3's. I have EFILive, I really wish I could post my tune up so you could see. In a nutshell though, the I6's already have knock from the factory, I left my timing stock cause my wife drives the TB more than me and she puts 87 in it. With 93 you may get away with a couple more degrees in the High octane PE table. The tps only reads 87% at WOT, thats just all it opens, mine is that way too. Next my PE modifiers were setup a bit lean on the low end and rich on the top end, I set my AFR (used my wideband), to 12.6-12.7 low and mid-range tapering up to 12.9ish past about 5000 rpms. I also changed the VVT cam position in PE mode and noticed some low end improvments, I had to lower those values rather than raise them. In that table, 0 is in the fully advanced position and numbers above 0 are retarding the cam. I played with with part throttle timing and helped milage some as well. I raised my rev limiter to 6700 I believe and removed the speed limiter (have had this big pig to 130).

Moving on to the transmission, I raised the base pressure some, 0'd out Tq mgt. I raised my shift vc. rpm for WOT to about 6400 1-2 and 6500 2-3.

Maybe that will help some!

Ryan

Originally Posted by Rhino79

Fueling is the main issue of the KR, you need to adjust the PE modifier to fatten it up some down lower and I would also adjust the PE enable delay tables.

Originally Posted by trever1t

Rhino79, thanks a lot for the free advice/help.

As you can see in this screen-shot the PE Modifier is zero'd below 5600rpms.



Should I just start adding to the rpms that have KR by 1 until KR is no longer shown?

As far as the PE Enable Delay it looks like I can modify the RPM and the TPS...or am i in looking the wrong area?