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SVT Shelby GT500
O2 extensions and issues
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<blockquote data-quote="Willie" data-source="post: 15573056" data-attributes="member: 14133"><p>Do you guys know WHY extensions sometimes cause this issue? .... I believe the answer is this >> The O2 voltage swings back and forth repeatedly, from lean to rich to lean... on and on. If the engine is running lean or rich, the sensor will not "swing" within specs (a specific time interval). And when this occurs, the PCM sets the lean or rich code. Here's the scoop >> The sensor voltage range is zero to one volt..! Very little voltage so any "error" in the wiring can cause a false reading. Adding an extension magnifies the potential for error, through an additional connector and quite possibly from having additional wire. So is there a solution if you have to add extensions? I believe I have found one. It is called Stabilant 22. It is a liquid product that enhances electrical contact connectivity. Whenever I disconnect a connector, I add a drop to every contact (pin) before re-plugging it.</p><p></p><p>In addition, when I disconnect any of the PCM connectors, I add a drop to EVERY pin before re-connecting as some of these circuits are also very low voltage.</p><p></p><p>The drawback to Stabilant 22 is the expense. It is super high priced. I paid about $90 for a 15mL bottle. I think you will need to decide for yourself if not using this is worth all the headaches. For me, I sucked it up, tried it, and have had no related electrical issues since. And I believe this tiny bottle is a lifetime supply.</p></blockquote><p></p>
[QUOTE="Willie, post: 15573056, member: 14133"] Do you guys know WHY extensions sometimes cause this issue? .... I believe the answer is this >> The O2 voltage swings back and forth repeatedly, from lean to rich to lean... on and on. If the engine is running lean or rich, the sensor will not "swing" within specs (a specific time interval). And when this occurs, the PCM sets the lean or rich code. Here's the scoop >> The sensor voltage range is zero to one volt..! Very little voltage so any "error" in the wiring can cause a false reading. Adding an extension magnifies the potential for error, through an additional connector and quite possibly from having additional wire. So is there a solution if you have to add extensions? I believe I have found one. It is called Stabilant 22. It is a liquid product that enhances electrical contact connectivity. Whenever I disconnect a connector, I add a drop to every contact (pin) before re-plugging it. In addition, when I disconnect any of the PCM connectors, I add a drop to EVERY pin before re-connecting as some of these circuits are also very low voltage. The drawback to Stabilant 22 is the expense. It is super high priced. I paid about $90 for a 15mL bottle. I think you will need to decide for yourself if not using this is worth all the headaches. For me, I sucked it up, tried it, and have had no related electrical issues since. And I believe this tiny bottle is a lifetime supply. [/QUOTE]
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O2 extensions and issues
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