Finn Lassen wrote:

You know all those electrical air valves left over after stripping off a
13B or 20B pollution control systems?

Instead of paying $16 - $25 for several air pressure sensors, why not
use those electrically controlled air valves to make an input
multiplexer leading to just one air pressure sensor?

Finn

Wonderful idea Finn. Those things are super cheap or free as most people
throw them away. Save those electric air valves folks and send them
to me if you don't plan on doing any pressure measurements.

Paul Lamar

I ran right outside to the garage and took a picture of my first gen RX7
solenoid valves. Sixteen of these, a pressure sensor and a 74154 one 
of sixteen data selector chip hooked to four data output lines on a PIC 
is all you need to make 16 pressure measurements in and around your 
cooling system. Should work on intake and exhaust manifolds as well. 
Great idea Finn. Major cost breakthrough. No reason not to take some pressure
measurements. I look forward to gathering some important information
in the near future. 

Paul Lamar
 
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