A non 3 gen TBI question if possible. At an extra long traffic light recording data, before stop, the O2 readings are normal, hitting hghs and lows, if I'm correct. newbee I am. It goes down to readings of .075 - .195ish for 7-8 data points, IAC reading is 17 through these points. This is at idle. At normal drving it hits the high and lows. At an idle, out of gear, I have an intermitent miss maybe abt ever 30-40 sec, or so. Is it normal for the readings to be like this? Just starting out and have not seen this before on any recordings. Trying to adjust a rich idle. Thanks

 

Have you done any mods? Sounds like its going into open loop when idling and running a tad lean.

 

Thanks Dimented, no mods, stock L05 truck motor. As stated, new at this, in WinALDL, how do I tell when its in open loop. It idles abt. 675, with the IAC readings, 17 and below. How do I get out of open loop or is that where I need to be at idle. The BLM's, I have gotten down to 126, INT's right at 128. Thats a good reading, yes. Mercie, this is addictive, now, open loop? Thanks my friend