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390 Backfires through exhaust on deceleration
By Steve M - 06/09/2005 4:02:30 PM; IP 24.31.179.170
I have a stock 390 4v with headers and edelbrock carb and intake. When I let off the gas after running it hard it pops through the exhaust. At first I thought it might be the mufflers, but I ran it uncapped headers at the track and the same thing happened. Any ideas what it could be? The timing is set at 10 degrees and the carb and intake are only 1 year old. I have the pertronix point replacements in the distributor. The motor is from 1970.
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Collapse <b>390 Backfires through exhaust on deceleration</b>&nbsp;-- <font color=#0000ff>Steve M, <i>06/09/2005</i></font>390 Backfires through exhaust on deceleration -- Steve M, 06/09/2005
Collapse <a href=../ForumFE/reply.aspx?ID=25093&Reply=25091><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor25093" onclick="return false;">RE: 390 Backfires through exhaust on deceleration</a>&nbsp;-- <font color=#0000ff>Lou, <i>06/09/2005</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=25093', contentMargin: 60, icon: $('anchor25093') }); </script>  RE: 390 Backfires through exhaust on deceleration -- Lou, 06/09/2005
 RE: 390 Backfires through exhaust on deceleration -- John, 06/09/2005
 Carb is an edelbrock 600 cfm -- Steve M, 06/10/2005
Collapse <a href=../ForumFE/reply.aspx?ID=25098&Reply=25091><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor25098" onclick="return false;">RE: 390 Backfires through exhaust on deceleration</a>&nbsp;-- <font color=#0000ff>walt, <i>06/09/2005</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=25098', contentMargin: 60, icon: $('anchor25098') }); </script>  RE: 390 Backfires through exhaust on deceleration -- walt, 06/09/2005
 Walt it is a stock ford dist from 1970 -- Steve M, 06/10/2005
 RE: 390 Backfires through exhaust on deceleration -- walt, 06/10/2005
 RE: 390 Backfires through exhaust on deceleration -- R. Hunt, 06/10/2005
Collapse <a href=../ForumFE/reply.aspx?ID=25544&Reply=25091><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor25544" onclick="return false;">RE: 390 Backfires through exhaust on deceleration</a>&nbsp;-- <font color=#0000ff>Cobradude, <i>08/12/2005</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=25544', contentMargin: 60, icon: $('anchor25544') }); </script>  RE: 390 Backfires through exhaust on deceleration -- Cobradude, 08/12/2005
Collapse <a href=../ForumFE/reply.aspx?ID=25545&Reply=25091><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor25545" onclick="return false;">Header gasket?</a>&nbsp;-- <font color=#0000ff>Steve M, <i>08/13/2005</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=25545', contentMargin: 60, icon: $('anchor25545') }); </script>  Header gasket? -- Steve M, 08/13/2005
 RE: Header gasket? -- Cobradude, 08/13/2005
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