wideband calibration

[BOOSTIN-BAYOU]

i have an AEM wideband do they need to be calibrated and right now it runs at 11.5 to 12.5 at 45mph when i when i go to WOT it peaks to 17 and then blinks three bars any ideas

 

[M5-]

The NGK/NTK wideband used to need to be calibrated but I've never needed to do an AEM. Is your sled lean popping because it sounds as if it's going off the chart. Thats what the --- means. Your O2 sensor may be on the way out but they usually just crap out. Any other symptoms?

M5

 

[BOOSTIN-BAYOU]

last week while test at home it would pop and i replaced a check valve that wasn't working and the problem went away didn't notice the wideband at that time but there was no popping yesterday would shut it down when i noticed what the w/b was reading i have a powderlites turbo with a head shim and rb3 running 91 oct at 10/12 lbs

 

[M5-]

The Nytro is harder to tell when its lean that the Apex but I'd be inclined to believe at this point that maybe the guage is right and there was something else going on. All seemed normal?

M5

 

[Empire087]

They dont need any calibration, You probably are going lean. how does your idle look for afr?

 

[roughrider99]

does the gauge read -- when holding wide open throttle? i put an aem gauge in my rally car this fall and it would read -- out of limits all the time when i chopped the throttle cause it it would read super lean and super rich for very short duration (like less than quarter of second), i found it was just normal operation of the gauge.

Maybe switch the sensor to see that makes a difference?

 

[pylon]

Yeah just because it goes to 17 doesnt mean its lean , some times its so rich it reads lean . I use my af gauge to check wide open throttle , idle and cruise af ratios . found it useless when im in and out of the gas .

 

[BOOSTIN-BAYOU]

at idle it runs 14 so your saying just drive through the w/b and it will read normal

 

[pylon]

You bet , no sudden blips of the throttle will give you and acurate reading on an aem gauge