Can you make oxygen sensor simulators ?
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Pro
Joined: Nov 2005
Posts: 536
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From: Bardstown Kentucky
Can you make oxygen sensor simulators ?
Does anyone know how to make oxygen sensor simulators? It seems like it would be pretty easy. Just a resistor? My 96 LT4 has 4 wire 02 sensors. 
Pro
Joined: Apr 2005
Posts: 590
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From: Boynton Beach, FL
Not that easy
ECM looks for cross counts from O2 sensors, how many times voltage crosses, high or low, mid point of output voltage range of O2 sensor, approximately 100mv to 950mv. Unless I'm totally off base, a straight resistor wont work. 
Larry
Larry
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Joined: Apr 2005
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I dont know if this is any help but, to avoid getting a cel from running no cats , a few guys in the subaru community have placed spark plug defoulers between the second o2 sensor and the bung, the sparkpluug defouler had the same threads as most o2 sensors. The defouler makes the see less gas and more o2, exactly as a cat would. and no cel. Ive personally seen this done and it did stop the cel
Burning Brakes
Joined: Jan 2002
Posts: 1,228
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From: Dallas Texas
I have come across schematics on the internet. Do a little hunting and internet and I am sure you'll come across something. To get the pulsing they use a 555 timer with some components to get the proper frequency. That is what most commercial units use. They charge a ton of cash for about $2.00 in electronics (that's retail).
Burning Brakes
Joined: Nov 2000
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From: Austria
Large Impressive Member
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From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
Originally Posted by 96lt4c4
Thanks guys, that spark plug defouler sounds kind of neat.
