Back fire issues
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I have a 95 nissan 240sx with a 02 LS1 w/ t56. My issue is... say Im sitting at a lred light and it turns green to go. My car will take of and drive fine but will back fire (Very Loud) a couple of times. What would cause this? Every thing is stock except the exhaust. That is Hinson long tubes into dynomax cats into magaflow mufflers. Thanks!
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As said above, check for air leaks too. Also make sure that a plug wasn't smacked/damaged during exhaust install. And as stated, an overly rich condition can foul plugs which will cause the backfiring too. A wideband scanner is a huge help here.. Should also be able to get a scan log and check how far it's trimming fuel too..