[M_a_t_t]

Originally Posted by 93Cobra#2771

“Lean burn” as you call it, is engaged a couple of ways. But let’s call it what it is - fuel cutoff during deceleration.
aka DFCO (deceleration fuel cutoff)

There are a couple ways this happens:

1. Time based, let off gas pedal for x amount of time, fuel is decreased/cut off to injectors. It’s somewhere in the 15-30 seconds range according to temp of car, speed, etc.

2. Charcoal canister purge operation, after roughly 1 minute of steady throttle. Valve opens and vents fuel fumes to intake and burns then off.

Your car doesn’t haven’t a lean burn mode like the old Honda lean burn cars of twenty years ago. A lean burn setup requires a wideband O2 and specific tuning to do it.

Having an automatic trans makes your job even harder. Ideally you need to be at 35mph or below, but trans won’t be in top gear. But 45mph can work.

Good luck with your quest - I think you will fall short and manage around 50mpg on your round trip assuming boat tail, weight removal, super aired up tires, etc. That’s my official guess.

https://nepis.epa.gov/Exe/ZyNET.exe/...s=1&ZyEntry=2#
Here is the epa report about the escort. Dated 95 so 96 not included in the report. Check page 35 (40 if you go by pdf numbers) it calls out running at 17:1. Page 81 (87) also refers to LOC increases exhaust temperature.

Another source (the one that ennored posted) states that 91-95 models had lean on cruise.
http://leiss.ca/wp-content/uploads/2...masquerade.pdf

And a link to a thread where they talk about it and someone with a wideband sensor and gauge confirms:

https://www.feoa.net/threads/goes-op...-cruise.26228/

If you are basing your last statement on your car it might be because it is a 96.