Wideband owners... afr question?

**defiler** · 5-3-08, 22:26

So I'm just curious as to what everyone else's reading are, tos ee if mine are normal...

At idle, if the car is cold, it reads 18:1.... if it's warm, it's around 16.5-17.1...

Is it supposed to be that lean at idle? I'm familiar as to what its supposed to be under cruise and boost, but never really looked into what its supposed to be at idle...

I know the gauge is right, because my other readings are normal:
On cruise on the freeway, I'm an even 14.8-14.9...
and under boost, its a nice 11.5-1, and dips to 10:1 at 9PSI...

compnut21 · 5-4-08, 0:00

just a tad rich and lean. i do 16.5 under idle/cruise, 11.5 everywhere else. warmup is like 15 idle. also i have ms so i guess my cars readings dont mean [shizzle].

**defiler** · 5-4-08, 11:12

You cheat. you can control what yours are at

**Zach** · 5-4-08, 21:34

someone get me a wideband, and I'll let you know :P I've got a zombiess chip, supposedly those lean out the fuel table a bit...

**defiler** · 5-4-08, 21:39

Well now that I have my trusty wideband installed, I'm going to test out both the Zombie and AdamTurbo chips and see what the real difference is...

**PGTF2T** · 5-6-08, 22:36

your a/f at idle seems high mine stays around 14.6-15.4 idle/cruise then under boost it dumps in fuel lol.

i want ms :P so i can get your idle readings and save gas lol

**defiler** · 5-7-08, 11:07

Thats why I try and stay out of boost

Maybe I need new plugs. I pulled one and they look pretty white. Plug wires are a little old also...

**Zach** · 5-7-08, 11:18

defiler, those readings are fine...if you were richer at idle/cruise you would be wasting gas...that's not a good thing.

**fredio54** · 5-7-08, 11:26

3 1G members with wideband! wow, that's more than I thought :-p

(yes, I know you have one too carnage)

**zlyricist** · 5-7-08, 11:44

you shouldnt notice a difference with idle and cruise between the two chips if all your sensors and ecu calc's are doing there job. the only difference you will see is at WOT

your idle a/f ratios are way lean, mine was always consistent with my cruise ratios

**defiler** · 5-7-08, 11:46

Weird. Im at 15.2 when I hit cruise at 55mph, but at 65mph its at 14.8... at 85 its way down to 12.4 on cruise...

**lundgren420** · 5-7-08, 11:54

me too, me too. I just wanted to chime in : )

**fredio54** · 5-7-08, 14:05

Could lean at idle = small air leak? or would the o2 correction fix that??

Quote:

Originally Posted by defiler

Weird. Im at 15.2 when I hit cruise at 55mph, but at 65mph its at 14.8... at 85 its way down to 12.4 on cruise...

Duh! LOL, cruising at 85mph uses quite a bit of power = quite a bit of load = needs 12.5AFR :-)

What kpa are you at at 85mph?? ie, how far in boost or vacuum?

Whats the bet its like 2psi or 0psi or something similar? Pretty good i'd say.

Fred.

**lundgren420** · 5-7-08, 14:13

I guess it only counts if it is hooked up and in use.

**pick_arse** · 5-7-08, 16:11

My wideband is always running in my car. idle lately is much leaner than it used to be 15-16 area now (14 bang on before)... crusing anywhere from 13.5-15 and wot goes to 9.5 and creeps back up to 11 and stays there.

I leaned out and melted a piston last fall so now i run the wideband all the time. Its shown me when to get off the throttle a few times now. Well worth the $350 id say.

5-3-08, 22:26	#1 (permalink)
defiler All lies lead to a truth. Join Date: Aug 2006 Location: Coon Rapids, MN, USA Age: 23 iTrader: (5)	Wideband owners... afr question? So I'm just curious as to what everyone else's reading are, tos ee if mine are normal... At idle, if the car is cold, it reads 18:1.... if it's warm, it's around 16.5-17.1... Is it supposed to be that lean at idle? I'm familiar as to what its supposed to be under cruise and boost, but never really looked into what its supposed to be at idle... I know the gauge is right, because my other readings are normal: On cruise on the freeway, I'm an even 14.8-14.9... and under boost, its a nice 11.5-1, and dips to 10:1 at 9PSI...
	-Sometimes you have to lie to find out what the truth is.... 89MX6 GT 4WS - Not stock... 135whp/170wtq@7PSI on blown VJ11

5-4-08, 0:00	#2 (permalink)
compnut21 4ws whore. Join Date: Oct 2007 Location: Olympia, WA iTrader: (2)	just a tad rich and lean. i do 16.5 under idle/cruise, 11.5 everywhere else. warmup is like 15 idle. also i have ms so i guess my cars readings dont mean [shizzle].
	89 GT 4WS/Megasquirt/Zebel o2/2.5" Exhaust/10ish psi 1989 Wiring Diagram PDF Useless crap for sale

5-4-08, 11:12	#3 (permalink)
defiler All lies lead to a truth. Join Date: Aug 2006 Location: Coon Rapids, MN, USA Age: 23 iTrader: (5)	You cheat. you can control what yours are at
	-Sometimes you have to lie to find out what the truth is.... 89MX6 GT 4WS - Not stock... 135whp/170wtq@7PSI on blown VJ11

5-4-08, 21:39	#5 (permalink)
defiler All lies lead to a truth. Join Date: Aug 2006 Location: Coon Rapids, MN, USA Age: 23 iTrader: (5)	Well now that I have my trusty wideband installed, I'm going to test out both the Zombie and AdamTurbo chips and see what the real difference is...
	-Sometimes you have to lie to find out what the truth is.... 89MX6 GT 4WS - Not stock... 135whp/170wtq@7PSI on blown VJ11

5-7-08, 11:07	#7 (permalink)
defiler All lies lead to a truth. Join Date: Aug 2006 Location: Coon Rapids, MN, USA Age: 23 iTrader: (5)	Thats why I try and stay out of boost Maybe I need new plugs. I pulled one and they look pretty white. Plug wires are a little old also...
	-Sometimes you have to lie to find out what the truth is.... 89MX6 GT 4WS - Not stock... 135whp/170wtq@7PSI on blown VJ11

5-7-08, 11:26	#9 (permalink)
fredio54 Join Date: Aug 2004 Location: Auckland, New Zealand iTrader: (1)	3 1G members with wideband! wow, that's more than I thought :-p (yes, I know you have one too carnage)
	DIYEFI.org - TRUE DIY engine management Mazda FE3/FE-DOHC Master Index Thread (work in progress) Mazda truck with FE-DOHC/FE3 "BIG like your house" Holset Turbo drinking 2.2 litres of fuel per minute ~= 385hp crank RIP SleepCounter :-( we will miss you! - RIP fredio54 :-( will we miss you?

5-7-08, 11:44	#10 (permalink)
zlyricist Join Date: May 2004 Location: arvada, CO, USA Age: 23 iTrader: (4)	you shouldnt notice a difference with idle and cruise between the two chips if all your sensors and ecu calc's are doing there job. the only difference you will see is at WOT your idle a/f ratios are way lean, mine was always consistent with my cruise ratios
	91 GT hy35 build in the works 06 maxima - the daily

5-7-08, 11:46	#11 (permalink)
defiler All lies lead to a truth. Join Date: Aug 2006 Location: Coon Rapids, MN, USA Age: 23 iTrader: (5)	Weird. Im at 15.2 when I hit cruise at 55mph, but at 65mph its at 14.8... at 85 its way down to 12.4 on cruise...
	-Sometimes you have to lie to find out what the truth is.... 89MX6 GT 4WS - Not stock... 135whp/170wtq@7PSI on blown VJ11

5-7-08, 11:54	#12 (permalink)
lundgren420 Join Date: Oct 2005 Location: OZARK, MO, USA Age: 24 iTrader: (5)	me too, me too. I just wanted to chime in : )
	1988 MX6 N/A M/T -getting a new heart. Check it out http://www.mx6.com/forums/showthread...ferrerid=35300 1989 Probe GT M/T -my new toy 1980 Monte Carlo W/305 H.O.-my first ride and iv'e still got her

5-7-08, 14:13	#14 (permalink)
lundgren420 Join Date: Oct 2005 Location: OZARK, MO, USA Age: 24 iTrader: (5)	I guess it only counts if it is hooked up and in use.
	1988 MX6 N/A M/T -getting a new heart. Check it out http://www.mx6.com/forums/showthread...ferrerid=35300 1989 Probe GT M/T -my new toy 1980 Monte Carlo W/305 H.O.-my first ride and iv'e still got her

5-7-08, 16:11	#15 (permalink)
pick_arse Join Date: Aug 2005 Location: , Canada iTrader: (0)	My wideband is always running in my car. idle lately is much leaner than it used to be 15-16 area now (14 bang on before)... crusing anywhere from 13.5-15 and wot goes to 9.5 and creeps back up to 11 and stays there. I leaned out and melted a piston last fall so now i run the wideband all the time. Its shown me when to get off the throttle a few times now. Well worth the $350 id say.