My AEM gives similarly odd reading and I tried everything to figure out why. Eventually I borrowed a friends Innovate system and got proper readings when I tested it on 2 cars. The problem is definitely not vacuum leaks or positioning of the socket in the exhaust etc. The readings my AEM gives are not at all correct. If they were my car would be surging and dysfunctional or melted. I bought the sensor and from the word go, it never worked.
Ok everyone's talking about how lean this is. AFR doesnt matter at idle, it wont hurt anything. I mean at 23:1 you might get idle detonation, but no one is that high. Check for vacuum leaks anyway, but 15-16 is fine. Are Acura Legends turbocharged? Has he added a turbocharger? It doesn't sound like it. If not, then ~ 13:1 AFR is actually ideal for naturally aspirated, much more rich than that will lose power. 11.5:1 is for turbocharged. And it really only HAS to be that rich if youre doing 6psi or more. Otherwise high 11s and even 12:1 would be fine.
15.5 if you a worried about your gas mileage, but who goes FI to save gas. Like you said, which I agree, depends on what you are doing with the car, but me personally only like to see 14.7 at idle, and cruising. And at WOT, I tune to 11.7 for my particular setup. I'd rather be a lil on the richer side then tune on the raged edge
@GreekPower Unless you know anything about AFR's or what stoichiometric is, then you my friend do not know jack. but it looks like you might have removed your stock o2 sensor or its gone bad causing you care to run lean at idle.
Why do you need a wideband if your car is neither turbo'd nor supercharged? We usually run widebands to view the fuel mixture because turbo's tend to make an engine run very rich. N/A you have no worries unless you are running a different injector spray lbs/min and pattern or altered your a/f ratio
I've watched a few vids on this. Looks like you aren't getting proper response times out of it compared to other vids, and you're getting those 3 bars and then it hangs for like two seconds. It may not be deep enough into the exhaust stream. I guess aesop253 is referring to your idle being around 17.5 when stoichiometric ratio should be around 14:7 ideally, but at least you are leaning rich when going WOT, but it's safer to lean on the rich side than on the lean side. Thanks for vid.
im anoob at this but i have a sr20de turbo with eklectronic cut out how far down why esxhaust should i put my O2 sensor. any help will be greatly apriciated thanks
I think its funny that there are a lot of faceless people telling this dude how to tune his car. He likes it how it is, so its leaner than your car...whoop de freaking doo, anyone can google what a good AFR is but guess what, every engine is different, and unless you're the guy doing the tuning why do you give a crap? Besides its a video about his guage, not his tuning ability
i tune cars every day your a good idle should be at 15.5-14.5 if forced induction, 11.0-12.0 during wide open throttle depending on what you want out of the car power wise through the rpms and your at 15??????? but if your not running a turbo that gauge is pointless and your not your boost gauge doesnt even FUNCTION. dont listen to these idiots either i work a Buscher racing :) and tune cars everyday.
Gotta love how people get on here with their uneducated opinions saying your running lean when your engine is not under any load. Idiots. These people F*&^ up forums. Beware what you read.
MOTHER OF LEANESS is it a stock/factory tune??? secuential injection?? if not i say again...lean as shit!! im sure you would get some extra hp from a better tune
you are running a bit lean my friend, have that checked out...dont want that shit blowing or pinging in a few weeks lol. j.k just trying to scare u..or do legends normally do that?
leaving ignition aside on a NA car you tune crancking pulsewidth, accel enrichment, over run fuel cut, AFR for all rpm and load ranges,barometric correction, intake air temp correction, exhasut gas oxigen correction and some other shit im forgetting. on a NA build you migh have to change fuel injectors it depends on duty cicle, if you change camshaft and or port a head the engine becomes more efficient at some rpm range and more inneficient at annother,you loose vacuum making stock tune USELESS
