Computer Diagnostics and Tuning Technical discussion on diagnostics and programming of the F-body computers

Help with LC1 setup

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Old Sep 26, 2008 | 03:46 PM
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BLUESMOKE's Avatar
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Joined: Jul 2007
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From: Kitchener, ON, Canada
Help with LC1 setup

Okay i have the Innovative LC1 wideband 02... i bought it 2 years ago and had it on my 97 and then today moved it over to my 94 z. The sensor sat in a box indoors for about a year inbetween. I got it all hooked up today and it reads 20-22afr at idle. I've calibrated including open air about 5 times and it's the same.

I have the 7 wire setup for the sensor... and the small 4 wire rectangular guage. I wired up the sensor to a switched source, got my grounds all tightened, and then ran the brown output wire of the sensor to the a/c (red/black) pressure sensor switch and the black wire of the guage.

The guage was wired up as follows.

Brown to red of sensor
Blue to white/green/blue of sensor(ground).
Black to brown(output) wire of sensor.
White... left cold.

I found a writeup online that had the white wire of the guage go to the black (calibration) wire of the sensor, but i didn't initially hook up the calibration switch or led so i left it. Since then i hooked up the switch and led to see what's wrong. I do not get any error codes with my led.

The really weird part is taht when i log afr with datamaster according to a writeup i found on here, i'm at 13.2 - 14.4 afr at idle and when i hold rpm at 2000 it goes to low 13's.

My stock o2's were reading right, 800v area but moving around quickly.

I'm not sure what's wrong... the sensor seems okay according to the diagnostics and datamaster...it's close anyways, but hte guage is way off so i dont' know what to trust.

Any help would be mega appreciated going racing this sunday and i need to get dialed in
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