AEM Wideband Installed!

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JimG
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AEM Wideband Installed!

Post by JimG »

Just completed the install of an AEM A/F gauge- now I need to understand what i'm seeing on the guage. Any tips?
Jim Gosses
86 XR4TI, 165K, T-5, IC, RR, PBR Fronts, T-bird Rear Discs
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my8950
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Re: AEM Wideband Installed!

Post by my8950 »

JimG wrote: Tue May 17, 2022 4:24 pm Just completed the install of an AEM A/F gauge- now I need to understand what i'm seeing on the guage. Any tips?
What are you seeing on the gauge?
JimG
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Re: AEM Wideband Installed!

Post by JimG »

I haven't had much time to drive it but a short drive found around 14.2 at cruising in 4th and lower when accelerating. I'll work on documenting it better. Perhaps on my drive to Carlisle!
Jim Gosses
86 XR4TI, 165K, T-5, IC, RR, PBR Fronts, T-bird Rear Discs
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hEaT
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Re: AEM Wideband Installed!

Post by hEaT »

Sounds about right Jim!

You should see it bouncing around near ~14.5 while at light cruise. It'll max out on deceleration when fuel injectors turn off. Lower numbers = richer, higher numbers = leaner. 14.7:1 is stoich on 0% ethanol fuel.

I've found the stock ECUs run really rich in boost. I was seeing 10:1 at 15-18psi on an LA3, a lot of power on the table. I tune my car to 11.5:1 at full boost/max torque.
Joe
1985 Nimbus Grey XR
2002 SVT Focus
2017 Ford Focus RS
JimG
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Re: AEM Wideband Installed!

Post by JimG »

What are you using to tune?
Jim Gosses
86 XR4TI, 165K, T-5, IC, RR, PBR Fronts, T-bird Rear Discs
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hEaT
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Re: AEM Wideband Installed!

Post by hEaT »

hEaT wrote: Wed May 25, 2022 3:03 pm Sounds about right Jim!

You should see it bouncing around near ~14.5 while at light cruise. It'll max out on deceleration when fuel injectors turn off. Lower numbers = richer, higher numbers = leaner. 14.7:1 is stoich on 0% ethanol fuel.

I've found the stock ECUs run really rich in boost. I was seeing 10:1 at 15-18psi on an LA3, a lot of power on the table. I tune my car to 11.5:1 at full boost/max torque.
Stinger PiMP (Megasquirt 3)
Joe
1985 Nimbus Grey XR
2002 SVT Focus
2017 Ford Focus RS
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