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Cobra Forums
2013-14 Shelby GT500
2013 GT500 Knock Retard
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<blockquote data-quote="Robot_trainer" data-source="post: 15869282" data-attributes="member: 157423"><p>I've heard even a rough road can trigger a false knock. Remember that knock sensor is merely a microphone tuned to read a certain frequency (engine knock has a definite frequency). Its a dumb device. If something sees that frequency, the PCM is going to get signal. It doesn't know where it came from. If its pulling 3 or 4 degrees you probably have a problem. And yes the gas is crap. Id use a good octane boost like Torco or Boostane no matter what. You really never know what you are getting at the service station. Too much money to gamble with. I'd also drop one heat range on the plugs (like a TRi7x) and use a colder thermostat.</p></blockquote><p></p>
[QUOTE="Robot_trainer, post: 15869282, member: 157423"] I've heard even a rough road can trigger a false knock. Remember that knock sensor is merely a microphone tuned to read a certain frequency (engine knock has a definite frequency). Its a dumb device. If something sees that frequency, the PCM is going to get signal. It doesn't know where it came from. If its pulling 3 or 4 degrees you probably have a problem. And yes the gas is crap. Id use a good octane boost like Torco or Boostane no matter what. You really never know what you are getting at the service station. Too much money to gamble with. I'd also drop one heat range on the plugs (like a TRi7x) and use a colder thermostat. [/QUOTE]
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