LC-1 issue...suggestions welcome
03-26-2006, 12:00 AM
#1
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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.
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.
03-27-2006, 09:19 AM
#4
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...
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...
