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Did some MPG Testing today.
Found a few interesting things: A) the 2000 Ford PCM system will NOT allow me to change the Air/Fuel Ratios with the MAF, I would reach 16:1 and for a couple of miles and then the PCM would go open loop and freak out.
So any use of a Digital Fuel Adjuster will be worthless, so a Digital Fuel Adjuster will not work on the car after all, I had thought I had gone a lot deeper with the A/F ratios, but even a little freaks out the PCM.
Second I found that EVEN adding the a control in line of the MAF caused the scan gauge to read much higher MPG like 35/50 MPG when here was no real change as reported correctly by the MPGunio…
And that with a EFI on the back O2s I can change the A/F ratios with the Zientronic Devices to 16:1 and get around 35 MPG with no noticeable power lost, so I reset it to 15.7:1 and will see how it feels.
Rich
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