Thread: Backfire on a 3800 SC: How bad is it?

My car always did it if I romped it real quick and let off the gas around 15-25mph.

Being catless with headers made it real easy to hear the quick pop. My thoughts is that it's because there is still extra fuel that could be burned off and the waste spark ignition system would lite the fuel off in the rear header/downpipe. Never hurt anything in the 3 years I had headers.

Originally Posted by Fivefingerdeathpunch

waste spark ignition system

Reading...It's answering the spark condition.

What's this about premature wear on copper plugs? I know that 104's will have to be replaced more frequently. I'm also fairly certain they work totally fine in these cars. This link looks like it could be rather dated - http://www.aa1car.com/library/sparkplugs_for_dis.htm

This link was also helpful regarding the ignition system - http://www.greatautohelp.com/auto_ba...scription.html