It would be handy if you could test your EFI with out having it on the
engine. In other words in the shop.

What you need is a Crank Angle Sensor AKA CAS simulator and a hand vacuum
pump for the MAP sensor. The vacuum pump is no problem as they can be had
for around $20 in auto parts stores.

The Crank Angle Sensor simulator is just a variable frequency variable pulse
width generator. Unfortunately manufacturer of these device want several
hundred dollars.

It took me  a few hours to make one suitable for testing an EFI system from
parts I had lying around. Nothing you can't find in Radio Shack. I was only
interested in 7500 RPM as that is worse aircraft engine case so this one is
fixed frequency... fixed pulse width out. With a couple of pots it could be
made variable frequency.

Here are all the tools you need and a picture or two of the device.

If enough people show an interest I will do a pc board and/or an assembled
unit. My guess is $50.


Paul Lamar

Paul--
    Sounds like a VERY worthwhile project of significant interest to
many of us!

Paul Vermillion

Thanks. It is getting very close to working.
My main limitation is learning the idiosyncrasies of ZBasic.
The manual was written by a computer science professor
and I am a Dick and Jane person :)

Speaking of that Mark, how is the book on ZBasic?

Paul Lamar