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RE: Stumble, Backfire

To: <ShewFamily@aol.com>, <6pack@autox.team.net>
Subject: RE: Stumble, Backfire
From: "Stephen Hanselman" <tr6@kc4sw.com>
Date: Mon, 4 Aug 2003 12:16:47 -0700
John,

My brush with missing and stumble was related to having the needles set to
high (rich?) lowered them down and it is essentially gone.

steve

List,
I got my car on the road on Sunday.  Still not completely finished, but I
have an appointment with the frame guy this afternoon to hopefully take care
of the misalignment of the hood.

I set the chokes, idle and timing before and the car runs and idles fine.
When I am driving on level ground it will stumble somewhat when
accelerating.  However, when I drove down to fill it up and came back up the
mountain, it was stumbling and in some cases backfiring so much that I
feared I wouldn't get it back home.  I richened up the mixture, reset the
timing and idle and took it out again and it performed better, but still has
some of the same stumble but much less backfire when coming back up the
mountain.  I richened the mixture even more, but have not had a chance to
get it back on the road, but will do so today when I take it to the frame
guy.

Anybody got any suggestions as to what the cause is.  I always thought the
stumble and back fire were caused by too lean a mixture.  If I still have
the problem this afternoon, I will take my carb tool with me and go the
other direction and try a leaner mixture.  Any tips are appreciated.
Thanks.
John Shewmake
'74 TR6
Chattanooga, TN

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