A/F Ratio at Idle
#1
A/F Ratio at Idle
Hey guys,
I have a wide-band kit in my car (aeroforce w/ the interceptor) and recently at idle I've been getting readings I'm not sure are right. The idle has always centered around 14.7-14.8 and the numbers would fluctuate as they're supposed to around 14.7(ie: between 14.3 and 15)
Recently though, the A/F has been centering around 15.0(between 14.7 and 15.3) and only occasionally does it even hit 14.7
Then today for a minute straight at idle the A/F was reading between 15.0 and 15.4 and didn't touch 14.9 for like a minute.
Do these seem normal? Brenspeed says it's fine and I know the computer controls the idle AFR but still they seem high and lean. Could something be wrong?
Thanks!
I have a wide-band kit in my car (aeroforce w/ the interceptor) and recently at idle I've been getting readings I'm not sure are right. The idle has always centered around 14.7-14.8 and the numbers would fluctuate as they're supposed to around 14.7(ie: between 14.3 and 15)
Recently though, the A/F has been centering around 15.0(between 14.7 and 15.3) and only occasionally does it even hit 14.7
Then today for a minute straight at idle the A/F was reading between 15.0 and 15.4 and didn't touch 14.9 for like a minute.
Do these seem normal? Brenspeed says it's fine and I know the computer controls the idle AFR but still they seem high and lean. Could something be wrong?
Thanks!
#2
Also, I know they aren't really high numbers but it's strange that they changed and that is what makes me think something is up.
BTW I've already tried recalibrating the wide-band controller----no go.
BTW I've already tried recalibrating the wide-band controller----no go.
#3
Try cleaning your MAF sensor. Maybe it is reading a hair off and the PCM is having a hard time finding stoich. Unless your fuel mileage has started to decline, or you notice a loss of power, I wouldn't worry about it. The only meaningful reading from an AF gauge is at WOT, and the only time that is really a big deal is if you have boost. The O2 sensors are constantly telling the PCM to go leaner or richer, even at idle, so AF is a reading that is never going to be very accurate unless the O2 sensors are ignored (ie in the case of WOT).
#7
Hmmm, I haven't had the battery off for a while and def not between when this happened.
I've cleaned the MAF recently but I don't think you can screw that up. You take it out, spray it with MAF cleaner and pop it back in.
I only have 38k so the sensors are probably good.
I don't keep track of mileage but it seems fine, as does the power and drive-ability.
Honestly, if the gauge didn't start reading leaner, I wouldn't have thought there were any potential problems.
Now what's this with the adaptive learning procedure?
I've cleaned the MAF recently but I don't think you can screw that up. You take it out, spray it with MAF cleaner and pop it back in.
I only have 38k so the sensors are probably good.
I don't keep track of mileage but it seems fine, as does the power and drive-ability.
Honestly, if the gauge didn't start reading leaner, I wouldn't have thought there were any potential problems.
Now what's this with the adaptive learning procedure?
#8
Again, I'm trying to relay that I know the #'s are in line for idle, It's just weird that they centered around 14.7(between 14.3-15) and now it centers around 15(14.9-15.5)
I drove around a lot today. Strangely for a little bit this evening, the #s seemed normal again. I tried to give all the info I could in the last post. Any more ideas? Also, would heat/humidity change the #'s this much?
I drove around a lot today. Strangely for a little bit this evening, the #s seemed normal again. I tried to give all the info I could in the last post. Any more ideas? Also, would heat/humidity change the #'s this much?