What sensors are being used; It seems to me that we might be able to
share information and thus reduce the workload for all.

I am looking for recommendations for the following:

1. absolute air pressure or MAP?

FreeScale MPX4250AP pressure sensor. See picture.

2. fuel pressure: 0-15psi

3. air temperature

Any low cost thermistor as Mazda engines are not equipped
with stand alone intake air temp monitors.

4. specs on the stock Mazda coolant temp sensor, i.e., inputs outputs,
resistance range, etc.

5. EGT - output for units in common use

6. coolant pressure

7. oil temp specs for stock Mazda oil temp

8. oil pressure specs for stock Mazda oil pressure

Thanks for your help.

Doc Custer
Retired Software Engineer and sometime Audiologist

Doc sounds like you are doing an engine monitoring system.
That comes after we get the engine running :) There are plenty of
those already on the market.

All you need for the PicAXE EFI is ignition trigger pulse,
intake manifold pressure  and intake air temperature.

Are you building the whole engine monitoring system
in each PicAXE injector controller?

The work load for that is three dozen BASIC instructions.

1.Measure the intake manifold pressure with the A to D.
2.Measure the intake manifold air temperature with the A to D.
3.Use the data to look it up in the 2D mixture table.
4.Adjust the pulse width generator. (Free runs in the background.)
5.Return to back ground loop and wait for next ign. pulse.

That's it!

Paul Lamar ...No rotor no motor.

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