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Cobra Forums
The Terminator
Engine/Tuning
Can worn out plain copper spark plugs cause a slight rich condition?
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<blockquote data-quote="01Jes" data-source="post: 13869481" data-attributes="member: 104472"><p>Having the same issue with a buddies cobra however it's 2 points more rich than yours. His AFR idles around 12.0. I found a pinched line behind the whipple but only yielded a small change. Could be a faulty AFR gauge, so we are going to datalog STFT's at idle and if they are off 1.0 the car is truly reading rich. Gonna change his plugs Tom also. Also curious if bad 1st stream 02's could cause this problem. </p><p></p><p>I also have my AFR sensor 02 in the 2nd stream bung. No cats for me and she idles 14.6.</p></blockquote><p></p>
[QUOTE="01Jes, post: 13869481, member: 104472"] Having the same issue with a buddies cobra however it's 2 points more rich than yours. His AFR idles around 12.0. I found a pinched line behind the whipple but only yielded a small change. Could be a faulty AFR gauge, so we are going to datalog STFT's at idle and if they are off 1.0 the car is truly reading rich. Gonna change his plugs Tom also. Also curious if bad 1st stream 02's could cause this problem. I also have my AFR sensor 02 in the 2nd stream bung. No cats for me and she idles 14.6. [/QUOTE]
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Can worn out plain copper spark plugs cause a slight rich condition?
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