Miata Mailing List: December 1997, Message #121
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From: 	BBirdwell@swri.edu

Subject: OBDII thought

Date: 	Mon, 1 Dec 1997 19:56:54 +0000



Will wrote,



>Barry, after a long walk in the woods, logged on and said:



Walking in the woods was one of the things I was doing while on vacation. :-)



> my educated

>guestimate is that the sensor maxes out at about 1-2 psi... nothing 

>electronic will help, IMO -I am thinking some sort of mechanical 

>pressure reducer/divider/somethingorother is needed to put inline 

>with the pressure line feed, so the actual air pressure getting to 

>the sensor gets knocked down to a range it can handle. .... Or maybe another 

>sensor altogether?



  Is the parameter data on the sensor(s) available? Maybe I could haul one 

over to Corky's and put it on his pressure tester with some electronics 

connected.  Motorola makes a heck of a lot of pressure transducers with 

available data and Electromotive sells GM sensors (actually MAP sensors) in 1, 

2, and 3 bar pressure ratings which implies this problem has been seen and 

conquered before. Heck, we will probably have to purchase the transducer and 

custom build the circuit but the transducer will be the most expensive part.

  I'm going to have to look at the manual to get a firm handle on this. Hope 

to be looking at one soon.



Barry