94-98 12V CPS Voltage

biggy238 said:
What is the purpose of the pull up resistor in this circuit? Curious is all.

What is Hall Effect and How Hall Effect Sensors Work - YouTube

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I "think" it is so you have a clean 0 to +12v signal. A electrical guru would be better at explaining it.

GAmes said:
A true statement if everyone who read my original post is as closed minded to accuracy and as adverse to learning something new as you seem to be.
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Okay, you won or whatever or something. Good job, move on. *bdh*
 
Tobin said:
I am not sure if the +12v will work. I am scared to try it and fry a $100 sensor. I tried hooking up +12v to a 94/95 +8v sensor and it didn't work but the sensor could have been bad in the first place. I am not sure the extra voltage would kill it.
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From the research I've done on this, guys have been using 12 volts on them for a while. Now, with which CPS, I'm not sure. This is where I first saw the info years back. I helped wire a friend's conversion and his worked with 12 volts. I'm not sure of the year of the sensor because I robbed one from one of my core engines and we stuck it on his p-pumped 24v in his chevy. He sold it a while back so I don't know how it did after that. He did daily drive it for 2 years and the tach never failed while he had it.

how to get your tach to work with the stock 12 valve CPS (crank position sensor))
 
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Thanks DieselWrencher. That is the write up I used. When I tried it on my '97 before I pulled the motor, I just used the ECM to power the sensor (+5v) but I didn't think about it at the time. Maybe I'll just try it with +12v and see what happens since it worked for you. Did you use a 1k Ohm resistor? Did you add any more notches in the balancer?
 
I did use a 1k ohm resistor, and I didn't add any notches to the balancer. We set the tach to 4cyl. I have some resistors left and if you want I'll send you a couple.
 
DieselWrencher said:
I did use a 1k ohm resistor, and I didn't add any notches to the balancer. We set the tach to 4cyl. I have some resistors left and if you want I'll send you a couple.
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Appreciate the offer but I got some here. I might just try the 12v and be done with it.
 
DieselWrencher said:
From the research I've done on this, guys have been using 12 volts on them for a while. Now, with which CPS, I'm not sure. This is where I first saw the info years back. I helped wire a friend's conversion and his worked with 12 volts. I'm not sure of the year of the sensor because I robbed one from one of my core engines and we stuck it on his p-pumped 24v in his chevy. He sold it a while back so I don't know how it did after that. He did daily drive it for 2 years and the tach never failed while he had it.

how to get your tach to work with the stock 12 valve CPS (crank position sensor))
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Thanks DieselWrencher, I got brave and just used 12v and it works fine with the 96-98 CPS.
 
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