LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Ohm readings for O2 and Knock sensor wires

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Old Nov 1, 2005 | 10:27 AM
  #1  
Casey_SS's Avatar
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From: Cedar Park, TX
Ohm readings for O2 and Knock sensor wires

Anyone know what the ohm readings should be when measuring the wires between the PCM and the sensors? I need to add about 4 feet of wire to reroute my harness away from the headers and want to make sure the extra wire doesn't add too much resistance and interfere with the signals the PCM receives.
Anyone have experience doing this type of thing? Kinda surprised that nobody else seems to have had my issues with headers being too close to the stock wiring locations....(do a search on my username if you want the long, gritty saga)
Thanks.
Old Nov 1, 2005 | 10:33 AM
  #2  
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From: Melvindale, MI, US
Re: Ohm readings for O2 and Knock sensor wires

as low as possible(under 5 ohms maybe?)ohm them out before moding, and check after, as long as it is stays about the same you should be fine, make sure you solder and heatshrink the connections you make
Old Nov 1, 2005 | 04:43 PM
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From: Little Rock, AR
Re: Ohm readings for O2 and Knock sensor wires

Sensor resistance should be between 3300-4500 ohms (OBD-I) or 93k-107k ohms (OBD-II). The wire should not add any appreciable resistance. Keep it in the range shown and you should be ok.
Old Nov 2, 2005 | 05:08 AM
  #4  
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Re: Ohm readings for O2 and Knock sensor wires

We either did have an issue that you mentioned or like me, simply bought the extensions I posted in your other thread and used zip ties to eliminate the problem from ever happening in the first place. I posted the longer of the 3 Casper offers but I used the 24 inch ones.

Your posts would be easier to follow if you continued with the same one and not start new ones.
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