LC-1 issue...suggestions welcome

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Mar 26, 2006 | 12:00 AM

muncie21

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From: NE Ohio

LC-1 issue...suggestions welcome

OK, so I installed the LC-1 today in place of my stock pre-cat O2 sensor. The intent was to be able to log the WB readings with HPT and simulate the NB sensor to keep the PCM happy.

Problem: After installation, idle AFRs are jacked!@!

Car has a slight bog off idle (pretty sure it wasn't there before) and the WB is reading 12.x AFR at idle. Last time I dynoed it, it was reading 14-15 AFR at idle.

Here's what I did:
1) Verified the HPT wideband readings with Innovate's logging sofware, yep those readings are real.
2) Used the factory default settings for the narrowband simulation.
3) Performed a free air calibration

This is idle, AFR is about 2 points below commanded.

This is steady state cruise, AFRs match commanded.

Mar 26, 2006 | 09:30 PM

oange ss

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looks like your O2 are flatlining at idle

Mar 27, 2006 | 09:05 AM

MeentSS02

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From: Dayton, OH

Run it completely open loop and see what it does...if that cures it, you'll see why I threw my narrowband O2 sensors in the trash.

Mar 27, 2006 | 09:19 AM

MrDude_1

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From: Charleston, SC

read the LC1 guide that soundengineer posted up..

if you dont change the sensor update frequency settings, it moves too fast for the PCM... so instead of reading ~14.7 it might read in the middle of a air pulse and be rich or lean... throwing the PCM off...