I can't really recommend the throttle enhancer....it doesn't really do anything performance-wise. In my opinion, you would be better off taking it out and setting the tps sensor per the instructions on
www.gnttype.org. (0.42-0.46 volts at idle)
Closed loop and open loop are two modes that the computer operates in. When you first start the car the computer is in open loop....meaning that it is using stored data tables to control the mixture until the car warms up. The idle is a little higher...the mixture a little richer etc. The computer is not using the o2 sensor or MAF to control the mixture in open loop.
When the car gets up to temperature, the computer will go into closed loop. At this point the computer uses the MAF/tps/o2 sensor/IAT/etc. as feedback to control the proper air-fuel mixture.
When you take your scantool readings, you want to have the car in closed loop. On a ScanMaster2 you'll know when you're in closed loop when the decimal point on the display stops blinking.
I wouldn't mess with the Translator settings until you get the TPS and IAC numbers tuned in at idle.
You never did mention what chip you're running. 850-925 idle RPM sounds kind of high, but it may be the chip you're using.
O2 cross counts tell you how active the O2 sensor is. If you're using a ScanMaster the numbers will count up to a max number (can't remember off the top of my head...) then start back at 0 and count up again. What it's telling you is that for each "cycle" of the ALDL data (about every 2 seconds to update) that the O2 sensor has switched from rich to lean.....crossing the "target" A/F mixture of 14.7:1. The computer is continuously adjusting the injector pulse widths to get the mixture right....using the O2 sensor as feedback.
You want the O2 cross counts to count up in rough increments of 10 to 20 for each cycle. When the CC's start to slow down it means the sensor is getting lazy and is need of replacement.
Whew...hope I didn't lose you on all that. It's really not as complicated as it sounds.
Good luck,
John
