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Original Message
Well....phooey!
By John - 11/03/2005 12:40:01 PM; IP 142.177.94.89
Replacing "two" missing header bolts and tightening the rest didn't do any good. Still a backfire in drier's side exhaust. Must check for carb mounting bolts being tight next I suppose. Somehow air is getting into exhaust and igniting fuel when I let off the gas. Doesn't happen after hard acceleration, just after short acceleration bursts. Ignition seems OK with all sparkplugs reading identical. Used to be when this happened, cleaning points fixed problem, but have Pertronix now and it has been fine for over a year. Doesn't happen on passenger's side. Passenger side is different in that the PCV valve is connected to that side. There is no anti-backfire valve on this engine. Might be getting air where header pipes slip fit into collector......oh phooey.....what a pain....LOL.
This thread, so far...
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Collapse <a href=../ForumFE/reply.aspx?ID=25994&Reply=25994><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor25994" onclick="return false;">Spark plugs for my 428?</a>&nbsp;-- <font color=#0000ff>John, <i>10/16/2005</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=25994', contentMargin: 60, icon: $('anchor25994') }); </script>  Spark plugs for my 428? -- John, 10/16/2005
Collapse <a href=../ForumFE/reply.aspx?ID=25995&Reply=25994><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor25995" onclick="return false;">Colder plugs foul quicker. Go the other way. N/M</a>&nbsp;-- <font color=#0000ff>Royce P, <i>10/16/2005</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=25995', contentMargin: 60, icon: $('anchor25995') }); </script>  Colder plugs foul quicker. Go the other way. N/M -- Royce P, 10/16/2005
Collapse <a href=../ForumFE/reply.aspx?ID=25997&Reply=25994><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor25997" onclick="return false;">True, but.....?</a>&nbsp;-- <font color=#0000ff>John, <i>10/16/2005</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=25997', contentMargin: 60, icon: $('anchor25997') }); </script>  True, but.....? -- John, 10/16/2005
Collapse <a href=../ForumFE/reply.aspx?ID=26004&Reply=25994><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor26004" onclick="return false;">Rf12yc</a>&nbsp;-- <font color=#0000ff>Cobra428, <i>10/17/2005</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=26004', contentMargin: 60, icon: $('anchor26004') }); </script>  Rf12yc -- Cobra428, 10/17/2005
Collapse <a href=../ForumFE/reply.aspx?ID=26005&Reply=25994><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor26005" onclick="return false;">RE: Rf12yc</a>&nbsp;-- <font color=#0000ff>John, <i>10/17/2005</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=26005', contentMargin: 60, icon: $('anchor26005') }); </script>  RE: Rf12yc -- John, 10/17/2005
Collapse <a href=../ForumFE/reply.aspx?ID=26006&Reply=25994><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor26006" onclick="return false;">Just wondering what type ignition you have.</a>&nbsp;-- <font color=#0000ff>Royce P, <i>10/17/2005</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=26006', contentMargin: 60, icon: $('anchor26006') }); </script>  Just wondering what type ignition you have. -- Royce P, 10/17/2005
Collapse <a href=../ForumFE/reply.aspx?ID=26008&Reply=25994><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor26008" onclick="return false;">My Ignition</a>&nbsp;-- <font color=#0000ff>John, <i>10/17/2005</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=26008', contentMargin: 60, icon: $('anchor26008') }); </script>  My Ignition -- John, 10/17/2005
Collapse <a href=../ForumFE/reply.aspx?ID=26009&Reply=25994><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor26009" onclick="return false;">RE: My Ignition</a>&nbsp;-- <font color=#0000ff>Royce P, <i>10/17/2005</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=26009', contentMargin: 60, icon: $('anchor26009') }); </script>  RE: My Ignition -- Royce P, 10/17/2005
Collapse <a href=../ForumFE/reply.aspx?ID=26063&Reply=25994><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor26063" onclick="return false;">Ah hah!...something unexpected</a>&nbsp;-- <font color=#0000ff>John, <i>11/01/2005</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=26063', contentMargin: 60, icon: $('anchor26063') }); </script>  Ah hah!...something unexpected -- John, 11/01/2005
Well....phooey! -- John, 11/03/2005
Collapse <a href=../ForumFE/reply.aspx?ID=26081&Reply=25994><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor26081" onclick="return false;">RE: Ah hah!...something unexpected</a>&nbsp;-- <font color=#0000ff>walt, <i>11/05/2005</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=26081', contentMargin: 60, icon: $('anchor26081') }); </script>  RE: Ah hah!...something unexpected -- walt, 11/05/2005
 Royce is probably right -- John, 11/06/2005
 RE: Spark plugs for my 428? -- walt, 11/02/2005
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