bobdec

OK, I know this has been beat to death, but being new to computer controlled tuning I was looking for some help on selecting the best method to set up my idle after a cam swap. I just installed a LT4 Hot Cam Kit upgrade in my DD 1994 Z28 w/A4 transmission. It's a mild upgrade as I need to keep it emission legal. The cam is 218/228 @.50 with LS of 112, the kit also included 1.6 RR and new valve springs. I have seem multiple ways to do this across various forums, tips, etc. I was planning on using TunerCat to up my Idle speed in drive from the 550 stock setting to something higher ?? and then tweak the TPS% at zero timing table a few degrees to smooth it out. Then check my MAP and adjust the low BLM Cell MAP boundary a little above the MAP at idle. After that, while monitoring knock, add a few degrees advance across the main and extended timing tables. I have also read about opening the TPS% 2-3 degrees with the setscrew then resetting the PCM TPS calibration to back to zero to help the IAC control the idle. Since this is OBD1 I do not have IAC volume to look at just IAC counts. Any thoughts out there ??

infinitebird

iTrader: (11)

With the hotcam I doubt you even have to mess with timing to make it idle good. Just bump up the idle a little to like 800. Also shouldn't be any need to adjust the throttle screw.

You seem to be on the right track.