Verifying Fuel Enrichment?
TECH Senior Member
Joined: Apr 2002
Posts: 6,080
Likes: 17
From: So.Cal.
During closed loop you could look at the LTFT's, these will be close to zero if the MAF (steady state airflow conditions) and the VE (transient conditions) are correct.
But, anything outside of closed loop a wideband is required (e.g. at WOT you can't rely on HO2Sx1 voltages being above some value since these are not "calibrated" to provide voltage:AFR conversion; some people are lucky and get away with this, but it is a bad idea).
But, anything outside of closed loop a wideband is required (e.g. at WOT you can't rely on HO2Sx1 voltages being above some value since these are not "calibrated" to provide voltage:AFR conversion; some people are lucky and get away with this, but it is a bad idea).
During closed loop you could look at the LTFT's, these will be close to zero if the MAF (steady state airflow conditions) and the VE (transient conditions) are correct.
But, anything outside of closed loop a wideband is required (e.g. at WOT you can't rely on HO2Sx1 voltages being above some value since these are not "calibrated" to provide voltage:AFR conversion; some people are lucky and get away with this, but it is a bad idea).
But, anything outside of closed loop a wideband is required (e.g. at WOT you can't rely on HO2Sx1 voltages being above some value since these are not "calibrated" to provide voltage:AFR conversion; some people are lucky and get away with this, but it is a bad idea).
^^^LTFT's is the theme I was looking for....just a way to verify closed loop enrichment. There are a couple of issues happening. First one is overly rich @ idle, and maybe rich off idle. I have P0154 bank2 -1. Then, an idle motor stuck on zero.
Once the bugs are worked out, the car will be dyno-tuned.
Thanks!
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