what's this "wideband" jargan?

[ScaryGary]

I see it referenced in more in-depth tuning threads and there is really no explanation I can find.

Specifically, someone was trying to adjust A/F via lemmiwinks, and another poster strongly recommended he use a "wideband" for measuring or tuning or something of that sort.

I'd appreciate an explanation!

thanks

[AudiA4Turbo22]

custom program that monitors everything about the car and allows everything to be adjusted it has a piece that attaches to ur exhaust and monitors exhaust flow and what not.

[dirtybrd]

Not flow, but the amount of oxygen in the exh. To much and the motor is running lean, too little and the eng. is running rich. Optimum for our cars is about 12.5:1 @ WOT.

[maxspeed]

its an auxiliary oxygen sensor that gives extremely accurate air fuel ratios instead of lambda or "narrow band" values

[F16HTON]

http://en.wikipedia.org/wiki/AFR_sensor

[dirtybrd]

WOW 19.0:1

"This option is especially important in new fuel control concepts such as lean-burn engines, where the engine’s fuel control changes at cruising speeds from 14.7:1 to a much leaner 19.0:1 or even higher."

[Kamin]

I think some Civics used to have that lean burn thing, like a 1994. Read that it is a popular car among hypermilers or whatever they are called.

[mike-2ptzero]

Your car has a wide band sensor.

[doublezero30]

not to thread jack, but how much do out o2 sensors cost? got a CEL for them the other day.

[sean1.8t]

its an auxiliary oxygen sensor that gives extremely accurate air fuel ratios instead of lambda or "narrow band" values

no "narrow band" here.

this is B6 country. all widebands

[mike-2ptzero]

not to thread jack, but how much do out o2 sensors cost? got a CEL for them the other day.

Anywhere between $65-$80 for the VW 5 wire wide band 02 sensor. The ones from the dealer might be slightly longer then the ones that are sold buy aftermarket companies.

[Papachristou]

try $200 from audi.. i would love to know a VW part number that would work instead for my front and rear o2s

[mike-2ptzero]

try $200 from audi.. i would love to know a VW part number that would work instead for my front and rear o2s

Well the one from the dealer has a longer cable. Nearly all of the aftermarket wide band units use a Bosch wide band 02 sensor which sells for $79.

VW AG
021906262
0258007 057/058


bosch 02 sensor

[sean1.8t]

try $200 from audi.. i would love to know a VW part number that would work instead for my front and rear o2s

being on the forums long enough, you should know to NEVER go to the dealer