Re[2]: Dead boost pressure sensor

["Mike Hopton" <mike@genesis-microchip.on.ca>]

     Electrosonic components offer a range of solid state pressure sensors for 
     about $150 (Canadian) they are:-
     
     Part No    Measurement     Pressure Range  Full Scale Output
     
     142PC05D   Differential    0-5 psi         5V
     142PC05G   Gage            0-5 psi         5V
     142PC15G   Gage            0-15psi         5V
     142PC15G   Vacuum (Gage)   0-15psi         5V
     142PC30A   Absolute        0-30psi         5V
     
     The differential pressure sensors have two connections, so a reference 
     other than atomospheric air pressure can be used.
     
     It should be fairly straight forward to match one of these sensors with an 
     op-amp to get the same response as the factory sensor.  If some one has   
     the response of the stock pressure sensor output voltage versus inlet 
     pressure please post it.
     
     Regards, Mike
     
     Disclaimer: These pressure transducers must not be used in any "Life 
     Support System" where failure could in any way endanger human life!
     
     p.s. Peter, I appreciate your posts to the list.


______________________________ Reply Separator _________________________________
Subject: Re: Dead boost pressure sensor
Author:  pjwales@magicnet.net (Peter Wales) at Internet
Date:    3/30/96 10:20 PM


The boost pressure sensor gives out 0-5v and should be about 2.25v with the 
engine not running.
     
You will have great difficulty in replacing only the sensor, we could not 
find a source for these when we broke the tit off removing them from cars, 
so we used a 25 PSI pressure sensor which gave a 0-5v reading. This meant 
the pressure the computer saw was low and there was a greater chance of 
pinging on high boost, but at stock boost levels there was no problem.
     
Needless to say the sensor was not the same and so some work had to be done 
to make it fit, but not much. The sensors cost us about $90 each in England 
and I can get you the source there. There should also be a US source for 
them as I believe they were US made. If you want I will contact my UK 
company on Monday morning and get the details. Please mail me directly.
     
Failing that its either a new computer or one from a breaker.
     
     
Peter Wales                    pjwales@magicnet.net 
President Superchips Inc
Chairman Superchips Ltd        "Timing is everything"
Superchips home page with all the answers http://www.superchips.com