AFR Gauge Read High

[Aus123]

hello

a quick question about my AFR gauge

I upgrade from narrow band to wide band AFR a few weeks ago.

 https://www.ebay.com.au/p/AEM-X-series-Wideband-02-UEGO-Air-Fuel-Ratio-Gauge-Kit-30-0300/1364585095?iid=323277678390&chn=ps&norover=1&mkevt=1&mkrid=705-139619-5960-0&mkcid=2&itemid=323277678390&targetid=468725514643&device=c&adtype=pla&googleloc=9071447&poi=&campaignid=1793098739&adgroupid=74958851248&rlsatarget=aud-692203741102:pla-468725514643&abcId=1139216&merchantid=7364522&gclid=Cj0KCQjwjrvpBRC0ARIsAFrFuV-fvxkSxxg9Y3riL8cZBJXLLRDoCSHLrPntNC04kkKPheFRCeO4ZA4aAnCiEALw_wcB

 

liked it very much as it can tell me a lot if I am running rich or lean and when cursing its around 14.7 where it should be for 98. very happy with the tune  but however when cruising over 60 to 100 kmph (freeway) when not acceleration (or closed throttle) the gauge shows lean at max. 

 here a video of it travailing on freeway and when I let the gas go you should be see ----.

 

Wondering if this is normal  or you think the tune is not right so I go back to my tuner.

car is 2010 xr6t running on 98 with 431 kw for more info.

thanks

[El Andrew]

Is normal to do that - basically means it is leaner than the range of the gauge which happens on major lift off the throttle. The car basically cuts most/all fuel for economy reasons during deceleration.

You don't need to worry about being lean on lift off like that. I have the same gauge and get the same display. What is more important is that it is sufficiently rich when on boost.

[finnas]

I'd be more worried about your oil pressure gauge.  That ain't right

[MBAF]

  On 17/07/2019 at 11:18 AM, El Andrew said:

Is normal to do that - basically means it is leaner than the range of the gauge which happens on major lift off the throttle. The car basically cuts most/all fuel for economy reasons during deceleration.

You don't need to worry about being lean on lift off like that. I have the same gauge and get the same display. What is more important is that it is sufficiently rich when on boost.

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this!!

 

for example my car on lift off cuts injector cycle completely and if I coast in gear I get 0% injector cycle and 0% fuel usage. 

[Aus123]

  On 19/07/2019 at 1:50 AM, finnas said:

I'd be more worried about your oil pressure gauge.  That ain't right

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Thanks everyone for your reply.

I had a chat with my tuner . They said the same thing about afr.

I am working on my oil gauge reading wrong. Earthed the bottom of the sender with wire to engine didnt work. Replaced my sender didnt work. I think its the actual  gauge broken.

[4321]

Above the oil filter is the oil temp switch, unscrew it & fit a mechanical guage to check what is actually happening (for peace of mind)

[El Andrew]

Presumably the gauge reads at full like that with ignition on but engine off?

[blacktur8oute]

What should it be reading when on E85

idle ?

cruising ?

on the throttle?

[samhouston]

You should see around 14-15 when idling and cruising, it will jump around a bit depending on load, etc.

Under full boost you shouldn't see anymore than 12 really.

[blacktur8oute]

Thanks